diff --git a/app/assets/javascript/main.js b/app/assets/javascript/main.js
index bfe28e13..bdc7aa2e 100644
--- a/app/assets/javascript/main.js
+++ b/app/assets/javascript/main.js
@@ -95,6 +95,9 @@ document.addEventListener('DOMContentLoaded', () => {
   // Handle reset data in background
   setupResetSessionLink()
 
+  // Auto-save breast density factors when changed
+  setupBreastDensityFactorsAutosave()
+
   // Reading workflow: auto-dismiss the opinion banner after a delay
   const opinionBanner = document.querySelector('[data-reading-opinion-banner]')
   if (opinionBanner) {
@@ -185,6 +188,101 @@ document.addEventListener('DOMContentLoaded', () => {
   }
 })
 
+// Breast density factors are edited in place rather than on their own page,
+// so there's no submit button to save them - each change posts on its own.
+function setupBreastDensityFactorsAutosave() {
+  const container = document.querySelector('[data-breast-density-factors-save-url]')
+  if (!container) {
+    return
+  }
+
+  const saveUrl = container.dataset.breastDensityFactorsSaveUrl
+  if (!saveUrl) {
+    return
+  }
+
+  const factorsName = 'breastDensityFactors'
+  const hrtName = 'breastDensityFactorsHrt'
+
+  const checkboxes = container.querySelectorAll(`input[name="${factorsName}"]`)
+  const hrtRadios = container.querySelectorAll(`input[name="${hrtName}"]`)
+
+  if (checkboxes.length === 0 && hrtRadios.length === 0) {
+    return
+  }
+
+  // Keep the expander's "n factors added" line in step with the inputs.
+  // Only the review page wraps these in an expander, so this does nothing
+  // elsewhere.
+  const updateContentsSummary = () => {
+    const summary = container
+      .closest('.js-expandable-section')
+      ?.querySelector('.app-details__contents-summary')
+
+    if (!summary) {
+      return
+    }
+
+    // "No" to HRT is an answer, not a factor - match the count in
+    // getBreastDensityFactors so the two never disagree
+    const checkedFactors = container.querySelectorAll(
+      `input[name="${factorsName}"]:checked`
+    ).length
+    const hrtYes = container.querySelector(`input[name="${hrtName}"]:checked`)?.value === 'yes'
+    const count = checkedFactors + (hrtYes ? 1 : 0)
+
+    if (count === 0) {
+      summary.textContent = 'No breast density factors added'
+    } else if (count === 1) {
+      summary.textContent = '1 breast density factor added'
+    } else {
+      summary.textContent = `${count} breast density factors added`
+    }
+  }
+
+  // Changes can land faster than the requests complete, so keep them in a
+  // queue - otherwise an earlier response could be the last one to arrive
+  let pendingSave = Promise.resolve()
+
+  const saveFactors = () => {
+    const formData = new URLSearchParams()
+
+    container
+      .querySelectorAll(`input[name="${factorsName}"]:checked`)
+      .forEach((checkbox) => formData.append(factorsName, checkbox.value))
+
+    const selectedHrt = container.querySelector(`input[name="${hrtName}"]:checked`)
+    if (selectedHrt) {
+      formData.append(hrtName, selectedHrt.value)
+    }
+
+    updateContentsSummary()
+
+    pendingSave = pendingSave
+      .then(async () => {
+        const response = await fetch(saveUrl, {
+          method: 'POST',
+          headers: {
+            'Content-Type': 'application/x-www-form-urlencoded',
+            'X-Requested-With': 'XMLHttpRequest'
+          },
+          body: formData.toString()
+        })
+
+        if (!response.ok) {
+          throw new Error(
+            `Breast density factors auto-save failed (${response.status})`
+          )
+        }
+      })
+      .catch((error) => console.error(error))
+  }
+
+  container
+    .querySelectorAll(`input[name="${factorsName}"], input[name="${hrtName}"]`)
+    .forEach((input) => input.addEventListener('change', saveFactors))
+}
+
 // Quick settings modal — press backtick (`) to open settings in a modal overlay.
 // On close, the page reloads to pick up any changes.
 document.addEventListener('keydown', (e) => {
diff --git a/app/lib/generators/medical-information-generator.js b/app/lib/generators/medical-information-generator.js
index 0ae1137e..2b0440dc 100644
--- a/app/lib/generators/medical-information-generator.js
+++ b/app/lib/generators/medical-information-generator.js
@@ -1,10 +1,9 @@
 // app/lib/generators/medical-information-generator.js
 
 const { generateSymptoms } = require('./medical-information/symptoms-generator')
-const { generateHRT } = require('./medical-information/hrt-generator')
 const {
-  generatePregnancyAndBreastfeeding
-} = require('./medical-information/pregnancy-and-breastfeeding-generator')
+  generateBreastDensityFactors
+} = require('./medical-information/breast-density-factors-generator')
 const {
   generateOtherMedicalInformation
 } = require('./medical-information/other-medical-information-generator')
@@ -59,23 +58,13 @@ const generateMedicalInformation = (options = {}) => {
     medicalInfo.symptoms = symptoms
   }
 
-  // Generate HRT information
-  const hrt = generateHRT({
-    probability: probabilityOfHRT
+  // Generate breast density factors (HRT, pregnancy, breastfeeding)
+  const breastDensityFactors = generateBreastDensityFactors({
+    probabilityOfHrt: probabilityOfHRT,
+    probabilityOfPregnancyBreastfeeding
   })
 
-  if (hrt) {
-    medicalInfo.hrt = hrt
-  }
-
-  // Generate pregnancy and breastfeeding information
-  const pregnancyAndBreastfeeding = generatePregnancyAndBreastfeeding({
-    probability: probabilityOfPregnancyBreastfeeding
-  })
-
-  if (pregnancyAndBreastfeeding) {
-    medicalInfo.pregnancyAndBreastfeeding = pregnancyAndBreastfeeding
-  }
+  Object.assign(medicalInfo, breastDensityFactors)
 
   // Generate other medical information
   const otherMedicalInformation = generateOtherMedicalInformation({
diff --git a/app/lib/generators/medical-information/breast-density-factors-generator.js b/app/lib/generators/medical-information/breast-density-factors-generator.js
new file mode 100644
index 00000000..5238e00c
--- /dev/null
+++ b/app/lib/generators/medical-information/breast-density-factors-generator.js
@@ -0,0 +1,56 @@
+// app/lib/generators/medical-information/breast-density-factors-generator.js
+
+/**
+ * Generate breast density factors
+ *
+ * Replaces the old separate HRT and pregnancy/breastfeeding generators. The
+ * question is now a simple yes/no for HRT plus a checkbox group for pregnancy
+ * and breastfeeding, so the generated data is just as simple.
+ *
+ * Pregnancy and breastfeeding are rare in the screening cohort (routine
+ * screening starts at 50), so they stay well below the HRT rate.
+ *
+ * @param {object} [options] - Generation options
+ * @param {number} [options.probabilityOfHrt] - Chance of currently taking HRT (0-1)
+ * @param {number} [options.probabilityOfPregnancyBreastfeeding] - Chance of being pregnant or breastfeeding (0-1)
+ * @param {number} [options.probabilityOfBeingAsked=0.8] - Chance the question was asked at all
+ * @returns {object} Object with breastDensityFactors and breastDensityFactorsHrt, either may be absent
+ */
+const generateBreastDensityFactors = (options = {}) => {
+  const {
+    probabilityOfHrt = 0.3,
+    probabilityOfPregnancyBreastfeeding = 0.05,
+    probabilityOfBeingAsked = 0.8
+  } = options
+
+  const result = {}
+
+  // Not every appointment has got as far as asking. Leaving the answer unset
+  // keeps "no medical information" a possible outcome, and lets the summaries
+  // distinguish "not answered" from a recorded "no"
+  if (Math.random() < probabilityOfBeingAsked) {
+    result.breastDensityFactorsHrt =
+      Math.random() < probabilityOfHrt ? 'yes' : 'no'
+  }
+
+  const factors = []
+
+  if (Math.random() < probabilityOfPregnancyBreastfeeding) {
+    // Breastfeeding is the more likely of the two at screening age
+    if (Math.random() < 0.7) {
+      factors.push('breastfeeding')
+    } else {
+      factors.push('pregnant')
+    }
+  }
+
+  if (factors.length > 0) {
+    result.breastDensityFactors = factors
+  }
+
+  return result
+}
+
+module.exports = {
+  generateBreastDensityFactors
+}
diff --git a/app/lib/generators/medical-information/hrt-generator.js b/app/lib/generators/medical-information/hrt-generator.js
deleted file mode 100644
index 19467cca..00000000
--- a/app/lib/generators/medical-information/hrt-generator.js
+++ /dev/null
@@ -1,63 +0,0 @@
-// app/lib/generators/medical-information/hrt-generator.js
-
-const { faker } = require('@faker-js/faker')
-const weighted = require('weighted')
-const dayjs = require('dayjs')
-
-// Generate a past date in 'MMMM YYYY' format (e.g., 'September 2022')
-const randomPastDate = (minMonthsAgo, maxMonthsAgo) => {
-  const monthsAgo = faker.number.int({ min: minMonthsAgo, max: maxMonthsAgo })
-  return dayjs().subtract(monthsAgo, 'month').format('MMMM YYYY')
-}
-
-// Example durations before stopping
-const DURATION_BEFORE_STOPPING = [
-  '6 months',
-  '1 year',
-  '2 years',
-  '3 years',
-  '5 years',
-  '8 years'
-]
-
-/**
- * Generate HRT information
- *
- * @param {object} [options] - Generation options
- * @param {number} [options.probability] - Chance of having HRT data (0-1)
- * @returns {object|null} HRT object or null if no HRT data
- */
-const generateHRT = (options = {}) => {
-  const { probability } = options
-
-  // Check if they have any HRT information
-  if (Math.random() > probability) {
-    return null
-  }
-
-  // Weighted selection of HRT status
-  const hrtQuestion = weighted.select({
-    'yes': 0.5,                    // Currently taking
-    'no-recently-stopped': 0.3,    // Recently stopped
-    'no': 0.2                      // No HRT
-  })
-
-  const hrt = { hrtQuestion }
-
-  // Add conditional fields based on status
-  if (hrtQuestion === 'yes') {
-    // Date HRT was started (6 months to 15 years ago)
-    hrt.hrtDateStarted = randomPastDate(6, 180)
-  }
-  else if (hrtQuestion === 'no-recently-stopped') {
-    // Date HRT was stopped (1-11 months ago)
-    hrt.hrtDateStopped = randomPastDate(1, 11)
-    hrt.hrtDurationBeforeStopping = faker.helpers.arrayElement(DURATION_BEFORE_STOPPING)
-  }
-
-  return hrt
-}
-
-module.exports = {
-  generateHRT
-}
diff --git a/app/lib/generators/medical-information/pregnancy-and-breastfeeding-generator.js b/app/lib/generators/medical-information/pregnancy-and-breastfeeding-generator.js
deleted file mode 100644
index 32fade8f..00000000
--- a/app/lib/generators/medical-information/pregnancy-and-breastfeeding-generator.js
+++ /dev/null
@@ -1,87 +0,0 @@
-// app/lib/generators/medical-information/pregnancy-and-breastfeeding-generator.js
-
-const { faker } = require('@faker-js/faker')
-const weighted = require('weighted')
-const dayjs = require('dayjs')
-
-// Generate a past date in 'MMMM YYYY' format
-const randomPastDate = (minMonthsAgo, maxMonthsAgo) => {
-  const monthsAgo = faker.number.int({ min: minMonthsAgo, max: maxMonthsAgo })
-  return dayjs().subtract(monthsAgo, 'month').format('MMMM YYYY')
-}
-
-// Generate a future date in 'MMMM YYYY' format
-const randomFutureDate = (minMonthsAhead, maxMonthsAhead) => {
-  const monthsAhead = faker.number.int({ min: minMonthsAhead, max: maxMonthsAhead })
-  return dayjs().add(monthsAhead, 'month').format('MMMM YYYY')
-}
-
-/**
- * Generate pregnancy and breastfeeding information
- *
- * @param {object} [options] - Generation options
- * @param {number} [options.probability] - Chance of having pregnancy/breastfeeding data (0-1)
- * @returns {object|null} Pregnancy and breastfeeding object or null
- */
-const generatePregnancyAndBreastfeeding = (options = {}) => {
-  const { probability } = options
-
-  // Check if they have any pregnancy/breastfeeding information
-  if (Math.random() > probability) {
-    return null
-  }
-
-  const info = {}
-
-  // Weighted selection of pregnancy status
-  info.pregnancyStatus = weighted.select({
-    'noNotPregnant': 0.7,      // Most common - not pregnant
-    'noButRecently': 0.2,      // Recently gave birth
-    'yes': 0.1                 // Currently pregnant
-  })
-
-  // Add conditional fields based on pregnancy status
-  if (info.pregnancyStatus === 'yes') {
-    // Due date 1-9 months in future
-    info.pregnancyDueDate = randomFutureDate(1, 9)
-  }
-  else if (info.pregnancyStatus === 'noButRecently') {
-    // Pregnancy ended 1-5 months ago
-    info.pregnancyEndDate = randomPastDate(1, 5)
-  }
-
-  // Weighted selection of breastfeeding status
-  // If recently pregnant, more likely to be breastfeeding
-  if (info.pregnancyStatus === 'noButRecently') {
-    info.breastfeedingStatus = weighted.select({
-      'yes': 0.6,               // Likely breastfeeding if recently gave birth
-      'recentlyStopped': 0.2,
-      'no': 0.2
-    })
-  } else if (info.pregnancyStatus === 'yes') {
-    // If pregnant, not breastfeeding
-    info.breastfeedingStatus = 'no'
-  } else {
-    info.breastfeedingStatus = weighted.select({
-      'no': 0.8,                // Most common
-      'yes': 0.1,               // Currently breastfeeding
-      'recentlyStopped': 0.1    // Recently stopped
-    })
-  }
-
-  // Add conditional fields based on breastfeeding status
-  if (info.breastfeedingStatus === 'yes') {
-    // Started breastfeeding 2 weeks to 18 months ago
-    info.breastfeedingStartDate = randomPastDate(0, 18)
-  }
-  else if (info.breastfeedingStatus === 'recentlyStopped') {
-    // Stopped breastfeeding 1-4 months ago
-    info.breastfeedingStopDate = randomPastDate(1, 4)
-  }
-
-  return info
-}
-
-module.exports = {
-  generatePregnancyAndBreastfeeding
-}
diff --git a/app/lib/utils/medical-information.js b/app/lib/utils/medical-information.js
index 1834ab14..bf53d8c3 100644
--- a/app/lib/utils/medical-information.js
+++ b/app/lib/utils/medical-information.js
@@ -417,87 +417,97 @@ const summariseBreastFeatures = (features) => {
 }
 
 /**
- * Summarise other relevant medical information (HRT, pregnancy/breastfeeding, other info)
+ * Read the breast density factors off an appointment's medical information
+ *
+ * A checkbox group posts a bare string when one box is ticked and an array
+ * when several are, so the stored value needs normalising before anything can
+ * read it. Doing that here means templates get a single shape to work with
+ * rather than repeating the coercion at every call site.
  *
  * @param {Object} medicalInformation - The medicalInformation object from appointment
- * @returns {Array<string>} Array of summary strings
+ * @returns {{factors: Array<string>, hrt: string|undefined, count: number, answeredCount: number, summaries: Array<string>}}
  */
-const summariseOtherRelevantInformation = (medicalInformation) => {
-  if (!medicalInformation) {
-    return []
+const getBreastDensityFactors = (medicalInformation) => {
+  const rawFactors = medicalInformation?.breastDensityFactors
+  const factors = Array.isArray(rawFactors)
+    ? rawFactors.filter(Boolean)
+    : rawFactors
+      ? [rawFactors]
+      : []
+
+  const hrt = medicalInformation?.breastDensityFactorsHrt
+
+  // "Not taking HRT" is an answer, but it isn't a density factor - only
+  // count the things that actually affect density
+  const count =
+    (hrt === 'yes' ? 1 : 0) +
+    (factors.includes('pregnant') ? 1 : 0) +
+    (factors.includes('breastfeeding') ? 1 : 0)
+
+  const summaries = summariseBreastDensityFactors(medicalInformation)
+
+  return {
+    factors,
+    hrt,
+    count,
+    // Everything worth showing, including a recorded "no" to HRT - use this
+    // to decide whether to show the row at all, and count for "n added"
+    answeredCount: summaries.length,
+    summaries
   }
+}
+
+/**
+ * Summarise breast density factors into an array of summary strings
+ *
+ * @param {Object} medicalInformation - The medicalInformation object from appointment
+ * @returns {Array<string>} Array of summary strings
+ */
+const summariseBreastDensityFactors = (medicalInformation) => {
+  const rawFactors = medicalInformation?.breastDensityFactors
+  const factors = Array.isArray(rawFactors)
+    ? rawFactors.filter(Boolean)
+    : rawFactors
+      ? [rawFactors]
+      : []
+
+  const hrt = medicalInformation?.breastDensityFactorsHrt
 
   const summaries = []
 
-  // HRT summary
-  const hrt = medicalInformation.hrt
-  if (hrt) {
-    if (hrt.hrtQuestion === 'yes') {
-      summaries.push(
-        `Taking HRT (started ${hrt.hrtDateStarted || 'date not specified'})`
-      )
-    } else if (hrt.hrtQuestion === 'no-recently-stopped') {
-      if (hrt.hrtDateStopped) {
-        summaries.push(`Recently stopped HRT (stopped ${hrt.hrtDateStopped})`)
-      } else {
-        summaries.push('Recently stopped HRT')
-      }
-    }
-    // Don't add anything for 'no' - that's the default/negative state
+  if (hrt === 'yes') {
+    summaries.push('Taking HRT')
+  } else if (hrt === 'no') {
+    summaries.push('Not taking HRT')
   }
 
-  // Pregnancy and breastfeeding summary
-  const pregBf = medicalInformation.pregnancyAndBreastfeeding
-  if (pregBf) {
-    // Pregnancy
-    if (pregBf.pregnancyStatus === 'yes') {
-      if (pregBf.pregnancyDueDate) {
-        summaries.push(`Pregnant (due ${pregBf.pregnancyDueDate})`)
-      } else {
-        summaries.push('Pregnant')
-      }
-    } else if (pregBf.pregnancyStatus === 'noButRecently') {
-      if (pregBf.pregnancyEndDate) {
-        summaries.push(`Recently pregnant (ended ${pregBf.pregnancyEndDate})`)
-      } else {
-        summaries.push('Recently pregnant')
-      }
-    }
-
-    // Breastfeeding
-    if (pregBf.breastfeedingStatus === 'yes') {
-      if (pregBf.breastfeedingStartDate) {
-        summaries.push(
-          `Breastfeeding (started ${pregBf.breastfeedingStartDate})`
-        )
-      } else {
-        summaries.push('Breastfeeding')
-      }
-    } else if (pregBf.breastfeedingStatus === 'recentlyStopped') {
-      if (pregBf.breastfeedingStopDate) {
-        summaries.push(
-          `Recently breastfeeding (stopped ${pregBf.breastfeedingStopDate})`
-        )
-      } else {
-        summaries.push('Recently breastfeeding')
-      }
-    }
+  if (factors.includes('pregnant')) {
+    summaries.push('Pregnant')
   }
 
-  // Other medical information (free text)
-  if (medicalInformation.otherMedicalInformation) {
-    // Truncate if very long, otherwise show as-is
-    const otherInfo = medicalInformation.otherMedicalInformation.trim()
-    if (otherInfo.length > 100) {
-      summaries.push(otherInfo.substring(0, 100) + '...')
-    } else {
-      summaries.push(otherInfo)
-    }
+  if (factors.includes('breastfeeding')) {
+    summaries.push('Breastfeeding')
   }
 
   return summaries
 }
 
+/**
+ * Summarise the free-text other medical information, truncating if long
+ *
+ * @param {Object} medicalInformation - The medicalInformation object from appointment
+ * @returns {string|null} Summary string, or null if there's nothing recorded
+ */
+const summariseOtherMedicalInformation = (medicalInformation) => {
+  const otherInfo = medicalInformation?.otherMedicalInformation?.trim()
+
+  if (!otherInfo) {
+    return null
+  }
+
+  return otherInfo.length > 100 ? otherInfo.substring(0, 100) + '...' : otherInfo
+}
+
 module.exports = {
   isValidMedicalHistoryType,
   getMedicalHistoryType,
@@ -510,5 +520,7 @@ module.exports = {
   summariseSymptoms,
   summariseBreastFeature,
   summariseBreastFeatures,
-  summariseOtherRelevantInformation
+  getBreastDensityFactors,
+  summariseBreastDensityFactors,
+  summariseOtherMedicalInformation
 }
diff --git a/app/routes/appointments/medical-information.js b/app/routes/appointments/medical-information.js
index aee90aad..11dd646d 100644
--- a/app/routes/appointments/medical-information.js
+++ b/app/routes/appointments/medical-information.js
@@ -9,6 +9,64 @@ const {
 } = require('../../lib/utils/referrers')
 
 module.exports = (router) => {
+  // Auto-save breast density factors as they're changed
+  //
+  // These answers are edited in place on the review page rather than on a
+  // sub-page with its own submit, so there's no form post to carry them.
+  // Like the other medical information sections, this writes to the temp
+  // appointment and is committed when the appointment is completed or paused.
+  //
+  // The inputs are named outside the appointment[...] namespace on purpose.
+  // They render inside other forms, and the kit's unchecked-checkbox script
+  // adds an "_unchecked" value for every checkbox in whichever form is being
+  // submitted. Since auto-store-data replaces arrays rather than merging
+  // them, an appointment-namespaced name would let any other form on the page
+  // wipe these answers. Keeping them out of that namespace means only this
+  // route ever writes them.
+  router.post(
+    '/clinics/:clinicId/appointments/:appointmentId/medical-information/breast-density-factors-save',
+    (req, res) => {
+      const { appointmentId } = req.params
+      const data = req.session.data
+
+      // An unticked checkbox group posts nothing at all, so a missing value
+      // means "none selected" rather than "unchanged"
+      const postedFactors = req.body?.breastDensityFactors
+      const factors = (
+        Array.isArray(postedFactors)
+          ? postedFactors
+          : postedFactors
+            ? [postedFactors]
+            : []
+      ).filter((factor) => factor && factor !== '_unchecked')
+
+      const postedHrt = req.body?.breastDensityFactorsHrt
+
+      // The appointment context middleware has already made the temp copy,
+      // so this is only defensive
+      if (data.appointment?.id !== appointmentId) {
+        res.status(409).send()
+        return
+      }
+
+      const medicalInformation = data.appointment.medicalInformation || {}
+      medicalInformation.breastDensityFactors = factors
+
+      if (postedHrt) {
+        medicalInformation.breastDensityFactorsHrt = postedHrt
+      }
+
+      data.appointment.medicalInformation = medicalInformation
+
+      // These aren't form fields for any other page - don't leave them in
+      // session data where auto-store-data has put them
+      delete data.breastDensityFactors
+      delete data.breastDensityFactorsHrt
+
+      res.status(204).send()
+    }
+  )
+
   // Save breast features (includes converting JSON string to structured data)
   router.post(
     '/clinics/:clinicId/appointments/:appointmentId/medical-information/record-breast-features/save',
diff --git a/app/views/_includes/forms/breast-density-factors.njk b/app/views/_includes/forms/breast-density-factors.njk
new file mode 100644
index 00000000..5aeac465
--- /dev/null
+++ b/app/views/_includes/forms/breast-density-factors.njk
@@ -0,0 +1,119 @@
+{# app/views/_includes/forms/breast-density-factors.njk #}
+{#
+  Breast density factors - HRT, pregnancy and breastfeeding.
+
+  Shown inline rather than on a sub-page, so when edits are allowed the inputs
+  render directly and save themselves as they're changed (see the autosave in
+  main.js). The save URL rides on the wrapper element.
+
+  The inputs are named outside the appointment[...] namespace on purpose. This
+  section renders inside other forms (the review page wraps everything in a
+  "complete and continue" form), and the kit's unchecked-checkbox script adds
+  an "_unchecked" value for every checkbox in whichever form is submitted.
+  Since auto-store-data replaces arrays rather than merging them, an
+  appointment-namespaced name would let any other form on the page wipe these
+  answers. The save route maps these names onto the appointment.
+#}
+
+{% set breastDensityFactors = appointment.medicalInformation | getBreastDensityFactors %}
+
+{% set participantName = participant | getFullName %}
+
+{% set hrtQuestion = "Has " + participantName + " begun a course of HRT since their last screening appointment?" %}
+{% set pregnantOrBreastfeedingQuestion = "Is " + participantName + " pregnant or breastfeeding?" %}
+
+{% set hrtInputHtml %}
+  {{ radios({
+    name: "breastDensityFactorsHrt",
+    value: breastDensityFactors.hrt,
+    classes: "nhsuk-radios--inline nhsuk-radios--small",
+    fieldset: {
+      legend: {
+        text: hrtQuestion,
+        classes: "nhsuk-fieldset__legend--s"
+      }
+    },
+    items: [
+      {
+        value: "yes",
+        text: "Yes"
+      },
+      {
+        value: "no",
+        text: "No"
+      }
+    ]
+  }) }}
+{% endset %}
+
+{% set pregnantOrBreastfeedingInputHtml %}
+  {{ checkboxes({
+    name: "breastDensityFactors",
+    values: breastDensityFactors.factors,
+    classes: "nhsuk-checkboxes--small",
+    fieldset: {
+      legend: {
+        text: pregnantOrBreastfeedingQuestion,
+        classes: "nhsuk-fieldset__legend--s"
+      }
+    },
+    items: [
+      {
+        value: "pregnant",
+        text: "Pregnant"
+      },
+      {
+        value: "breastfeeding",
+        text: "Breastfeeding"
+      }
+    ]
+  }) }}
+{% endset %}
+
+{% set hrtSummaryHtml %}
+  {% if breastDensityFactors.hrt == "yes" %}
+    <p>Yes</p>
+  {% elseif breastDensityFactors.hrt == "no" %}
+    <p>No</p>
+  {% else %}
+    <p>Not answered</p>
+  {% endif %}
+{% endset %}
+
+{% set pregnantOrBreastfeedingSummaryHtml %}
+  {% if breastDensityFactors.factors | length %}
+    <ul class="nhsuk-list">
+      {% if breastDensityFactors.factors | includes("pregnant") %}
+        <li>Pregnant</li>
+      {% endif %}
+      {% if breastDensityFactors.factors | includes("breastfeeding") %}
+        <li>Breastfeeding</li>
+      {% endif %}
+    </ul>
+  {% else %}
+    <p>No</p>
+  {% endif %}
+{% endset %}
+
+<div data-breast-density-factors-save-url="{{ contextUrl }}/medical-information/breast-density-factors-save">
+  {{ summaryList({
+    rows: [
+      {
+        key: {
+          text: "HRT (hormone replacement therapy)"
+        },
+        value: {
+          html: hrtInputHtml if allowEdits else hrtSummaryHtml
+        }
+      },
+      {
+        key: {
+          text: "Pregnant or breastfeeding"
+        },
+        value: {
+          html: pregnantOrBreastfeedingInputHtml if allowEdits else pregnantOrBreastfeedingSummaryHtml
+        }
+      }
+    ]
+  } | removeLastRowBorder ) }}
+</div>
diff --git a/app/views/_includes/medical-information/index.njk b/app/views/_includes/medical-information/index.njk
index 78da700f..19505023 100644
--- a/app/views/_includes/medical-information/index.njk
+++ b/app/views/_includes/medical-information/index.njk
@@ -219,60 +219,72 @@
 {% endswitch %}
 
 {# -------------------------------------------------------------- #}
-{# Other relevant information #}
-{% set sectionHeading = "Other relevant information" %}
-{% set subHeading = "Including HRT, pregnancy, breastfeeding and mammographer notes" %}
-{% set sectionId = sectionHeading | kebabCase %}
-{% set scrollTo = sectionId %}
+{# Breast density factors #}
+{% set breastDensitySectionId = "breast-density-factors" %}
+{% set scrollTo = breastDensitySectionId %}
 
-{% set otherRelevantInformationHtml %}
-  {% include "_includes/summary-lists/medical-information/other-relevant-information.njk" %}
+{% set breastDensityFactorsHtml %}
+  {% include "_includes/forms/breast-density-factors.njk" %}
 {% endset %}
 
-{% set otherRelevantInformationCount = 0 %}
+{% set breastDensityCount = (appointment.medicalInformation | getBreastDensityFactors).count %}
+{% set breastDensityContentsSummary = breastDensityCount ~ (" breast density factor added" if breastDensityCount == 1 else " breast density factors added") if breastDensityCount > 0 else "No breast density factors added" %}
 
-{% if appointment.medicalInformation.hrt.hrtQuestion == 'yes' %}
-  {% set otherRelevantInformationCount = otherRelevantInformationCount + 1 %}
-{% endif %}
+{% switch displayFormat %}
+  {% case 'flat' %}
+    <h2 id="{{ breastDensitySectionId }}">Breast density factors</h2>
+    {{ breastDensityFactorsHtml | safe }}
+  {% case 'card' %}
+    {% call card({
+      heading: "Breast density factors",
+      attributes: {
+        id: breastDensitySectionId
+      }
+    }) %}
+      {{ breastDensityFactorsHtml | safe }}
+    {% endcall %}
+  {% default %}
+    {{ appDetails({
+      id: breastDensitySectionId,
+      classes: "nhsuk-expander js-expandable-section js-track-expanded",
+      summaryText: "Breast density factors",
+      contentsSummary: breastDensityContentsSummary,
+      html: breastDensityFactorsHtml,
+      status: "To review"
+    }) }}
+{% endswitch %}
 
-{% if appointment.medicalInformation.pregnancyAndBreastfeeding.pregnancyStatus == 'yes' %}
-  {% set otherRelevantInformationCount = otherRelevantInformationCount + 1 %}
-{% endif %}
+{# -------------------------------------------------------------- #}
+{# Other medical information #}
+{% set otherMedicalInfoSectionId = "other-medical-information" %}
+{% set scrollTo = otherMedicalInfoSectionId %}
 
-{% if appointment.medicalInformation.pregnancyAndBreastfeeding.breastfeedingStatus == 'yes' %}
-  {% set otherRelevantInformationCount = otherRelevantInformationCount + 1 %}
-{% endif %}
+{% set otherMedicalInformationHtml %}
+  {% include "_includes/summary-lists/medical-information/other-relevant-information.njk" %}
+{% endset %}
 
-{% if otherRelevantInformationCount > 0 %}
-  {% set otherRelevantInformationSummary = otherRelevantInformationCount ~ " other relevant information added" %}
-{% else %}
-  {% set otherRelevantInformationSummary = "No other relevant information added" %}
-{% endif %}
+{% set otherMedicalInfoContentsSummary = "Other medical information added" if appointment.medicalInformation.otherMedicalInformation else "No other medical information added" %}
 
 {% switch displayFormat %}
   {% case 'flat' %}
-    <h2 id="{{ sectionId }}">{{ sectionHeading }}</h2>
-    {{ otherRelevantInformationHtml | safe }}
+    <h2 id="{{ otherMedicalInfoSectionId }}">Other medical information</h2>
+    {{ otherMedicalInformationHtml | safe }}
   {% case 'card' %}
     {% call card({
-      heading: sectionHeading,
+      heading: "Other medical information",
       attributes: {
-        id: sectionId
+        id: otherMedicalInfoSectionId
       }
     }) %}
-      <p>
-        {{ subHeading }}
-      </p>
-      {{ otherRelevantInformationHtml | safe }}
+      {{ otherMedicalInformationHtml | safe }}
     {% endcall %}
   {% default %}
     {{ appDetails({
-      id: sectionId,
+      id: otherMedicalInfoSectionId,
       classes: "nhsuk-expander js-expandable-section js-track-expanded",
-      summaryText: sectionHeading,
-      subtitle: subHeading,
-      contentsSummary: otherRelevantInformationSummary,
-      html: otherRelevantInformationHtml,
+      summaryText: "Other medical information",
+      contentsSummary: otherMedicalInfoContentsSummary,
+      html: otherMedicalInformationHtml,
       status: "To review"
     }) }}
 {% endswitch %}
diff --git a/app/views/_includes/summary-lists/medical-info-summary.njk b/app/views/_includes/summary-lists/medical-info-summary.njk
index 4fb122de..a815c1ba 100644
--- a/app/views/_includes/summary-lists/medical-info-summary.njk
+++ b/app/views/_includes/summary-lists/medical-info-summary.njk
@@ -127,23 +127,30 @@
 {# Build referrer chain for add journey: confirmation -> review #}
 {% set mammogramsAddReferrerChain = currentUrl | appendReferrer(contextUrl + "/confirm-information/previous-mammograms") %}
 
-{# Other relevant information summary #}
-{# Get other relevant information summaries #}
-{% set otherRelevantInfoSummaries = appointment.medicalInformation | summariseOtherRelevantInformation %}
-{% set otherRelevantInfoCount = otherRelevantInfoSummaries | length %}
+{# Breast density factors summary #}
+{% set breastDensityFactors = appointment.medicalInformation | getBreastDensityFactors %}
+{# Show the row whenever there's an answer to show, including "not taking HRT" #}
+{% set breastDensityCount = breastDensityFactors.answeredCount %}
 
-{# Build other relevant information HTML #}
-{% set otherRelevantInfoHtml %}
-  {% if otherRelevantInfoCount == 0 %}
-    <p>No other information added</p>
-  {% elif otherRelevantInfoCount == 1 %}
-    <p>{{ otherRelevantInfoSummaries[0] }}</p>
-  {% else %}
+{% set breastDensityFactorsHtml %}
+  {% if breastDensityFactors.summaries | length %}
     <ul class="nhsuk-list">
-      {% for summary in otherRelevantInfoSummaries %}
+      {% for summary in breastDensityFactors.summaries %}
         <li>{{ summary }}</li>
       {% endfor %}
     </ul>
+  {% else %}
+    <p>No breast density factors added</p>
+  {% endif %}
+{% endset %}
+
+{# Other medical information summary #}
+{% set otherMedicalInfo = appointment.medicalInformation | summariseOtherMedicalInformation %}
+{% set otherMedicalInfoHtml %}
+  {% if otherMedicalInfo %}
+    <p>{{ otherMedicalInfo }}</p>
+  {% else %}
+    <p>No other medical information added</p>
   {% endif %}
 {% endset %}
 
@@ -266,20 +273,40 @@
   }) %}
 {% endif %}
 
-{% if not showOnlyPopulated or otherRelevantInfoCount > 0 %}
+{% if not showOnlyPopulated or breastDensityCount > 0 %}
+  {% set rows = rows | push({
+    key: {
+      text: "Breast density factors"
+    },
+    value: {
+      html: breastDensityFactorsHtml
+    },
+    actions: {
+      items: [
+        {
+          href: ("./confirm-information/breast-density-factors") | urlWithReferrer(currentUrl),
+          text: "View or change",
+          visuallyHiddenText: "breast density factors"
+        }
+      ]
+    } if allowEdits
+  }) %}
+{% endif %}
+
+{% if not showOnlyPopulated or otherMedicalInfo %}
   {% set rows = rows | push({
     key: {
-      text: "Other relevant information"
+      text: "Other medical information"
     },
     value: {
-      html: otherRelevantInfoHtml
+      html: otherMedicalInfoHtml
     },
     actions: {
       items: [
         {
           href: ("./confirm-information/other-relevant-information") | urlWithReferrer(currentUrl),
           text: "View or change",
-          visuallyHiddenText: "other relevant information"
+          visuallyHiddenText: "other medical information"
         }
       ]
     } if allowEdits
diff --git a/app/views/_includes/summary-lists/medical-information/other-relevant-information.njk b/app/views/_includes/summary-lists/medical-information/other-relevant-information.njk
index 9e969635..6a3aa8ef 100644
--- a/app/views/_includes/summary-lists/medical-information/other-relevant-information.njk
+++ b/app/views/_includes/summary-lists/medical-information/other-relevant-information.njk
@@ -1,122 +1,9 @@
 {# app/views/_includes/summary-lists/medical-information/other-relevant-information #}
-
-{% set hrtHtml %}
-  {% set hrtData = appointment.medicalInformation.hrt %}
-
-  {% if hrtData %}
-    {% if hrtData.hrtQuestion == 'yes' %}
-      <p>
-        Currently taking HRT
-      </p>
-      <p>
-        {# Example: "Started: September 2022" #}
-        Started: {{ hrtData.hrtDateStarted }}
-      </p>
-    {% elseif hrtData.hrtQuestion == 'no-recently-stopped' %}
-      <p>
-        Recently stopped taking HRT
-      </p>
-      <p>
-        Duration taken: {{ hrtData.hrtDurationBeforeStopping }}<br>
-        Date stopped: {{ hrtData.hrtDateStopped }}<br>
-      </p>
-    {% elseif hrtData.hrtQuestion == 'no' %}
-      Not taking HRT
-    {% else %}
-      No information provided
-    {% endif %}
-  {% else %}
-    {{ valueHtml }}
-  {% endif %}
-{% endset %}
-
-{% set pregnancyAndBreastfeedingHtml %}
-  {% set pregnancyAndBreastfeedingData = appointment.medicalInformation.pregnancyAndBreastfeeding %}
-
-  {% if pregnancyAndBreastfeedingData %}
-    {% if pregnancyAndBreastfeedingData.pregnancyStatus == 'yes' %}
-      <p>
-        Currently pregnant
-      </p>
-      <p>
-        {# Example: "Due date: June 2026" #}
-        Due date: {{ pregnancyAndBreastfeedingData.pregnancyDueDate }}
-      </p>
-    {% elseif pregnancyAndBreastfeedingData.pregnancyStatus == 'noButRecently' %}
-      <p>
-        Recently pregnant
-      </p>
-      <p>
-        Pregnancy ended: {{ pregnancyAndBreastfeedingData.pregnancyEndDate }}
-      </p>
-    {% elseif pregnancyAndBreastfeedingData.pregnancyStatus == 'noNotPregnant' %}
-      <p>Not pregnant</p>
-    {% else %}
-      <p>No information provided</p>
-    {% endif %}
-
-  {% if pregnancyAndBreastfeedingData.breastfeedingStatus == 'yes' %}
-      <p>
-        Currently breastfeeding
-      </p>
-      <p>
-        {# Example: "Started: January 2026" #}
-        Started: {{ pregnancyAndBreastfeedingData.breastfeedingStartDate }}
-      </p>
-    {% elseif pregnancyAndBreastfeedingData.breastfeedingStatus == 'recentlyStopped' %}
-      <p>
-        Recently breastfeeding
-      </p>
-      <p>
-        Date stopped: {{ pregnancyAndBreastfeedingData.breastfeedingStopDate }}
-      </p>
-    {% elseif pregnancyAndBreastfeedingData.breastfeedingStatus == 'no' %}
-      <p>Not breastfeeding</p>
-    {% else %}
-      <p>No information provided</p>
-    {% endif %}
-  {% else %}
-    {{ valueHtml }}
-  {% endif %}
-
-{% endset %}
+{# Shows only the other medical information (free-text) row.
+   Breast density factors have their own include: breast-density-factors.njk #}
 
 {{ summaryList({
   rows: [
-    {
-      key: {
-        text: "Hormone replacement therapy (HRT)"
-      },
-      value: {
-        html: hrtHtml
-      },
-      actions: {
-        items: [
-          {
-            href: contextUrl + "/medical-information/hormone-replacement-therapy" | urlWithReferrer(referrerChain | appendReferrer(currentUrl), scrollTo),
-            text: "Change",
-            visuallyHiddenText: "hormone replacement therapy (HRT)"
-          }
-        ]
-      } if allowEdits
-    },
-    {
-      key: {
-        text: "Pregnancy and breastfeeding"
-      },
-      value: {
-        html: pregnancyAndBreastfeedingHtml
-      },
-      actions: {
-        items: [
-          {
-            href: contextUrl + "/medical-information/pregnancy-and-breastfeeding" | urlWithReferrer(referrerChain | appendReferrer(currentUrl), scrollTo),
-            text: "Change",
-            visuallyHiddenText: "pregnancy and breastfeeding"
-          }
-        ]
-      } if allowEdits
-    },
     {
       key: {
         text: "Other medical information"
diff --git a/app/views/appointments/check-information.html b/app/views/appointments/check-information.html
index ea32df8d..a9adb810 100644
--- a/app/views/appointments/check-information.html
+++ b/app/views/appointments/check-information.html
@@ -144,16 +144,28 @@
     }
   }) }}
 
-  {# Other relevant information card #}
-  {% set otherRelevantInformationHtml %}
+  {# Breast density factors card #}
+  {% set breastDensityFactorsHtml %}
+    {% include "_includes/forms/breast-density-factors.njk" %}
+  {% endset %}
+
+  {{ card({
+    heading: "Breast density factors",
+    headingLevel: "2",
+    feature: true,
+    descriptionHtml: breastDensityFactorsHtml
+  }) }}
+
+  {# Other medical information card #}
+  {% set otherMedicalInformationHtml %}
     {% include "_includes/summary-lists/medical-information/other-relevant-information.njk" %}
   {% endset %}
 
   {{ card({
-    heading: "Other relevant medical information",
+    heading: "Other medical information",
     headingLevel: "2",
     feature: true,
-    descriptionHtml: otherRelevantInformationHtml
+    descriptionHtml: otherMedicalInformationHtml
   }) }}
 
 {% endset %}
diff --git a/app/views/appointments/confirm-information/breast-density-factors.html b/app/views/appointments/confirm-information/breast-density-factors.html
new file mode 100644
index 00000000..90dcaab7
--- /dev/null
+++ b/app/views/appointments/confirm-information/breast-density-factors.html
@@ -0,0 +1,45 @@
+{# app/views/appointments/confirm-information/breast-density-factors.html #}
+
+{% extends 'layout-appointment.html' %}
+
+{% set pageHeading = "Review breast density factors" %}
+{% set showNavigation = false %}
+{% set activeWorkflowStep = 'check-information' %}
+{% set hideBackLink = true %}
+
+{% set allowEdits = true %}
+
+{% set gridColumn = "nhsuk-grid-column-full" %}
+
+{% set scrollTo = "breast-density-factors" %}
+
+{% block pageContent %}
+
+  {# TODO: Ideally this would be before the main element #}
+  {{ backLink({
+    href: "../check-information" | getReturnUrl(referrerChain),
+    text: "Back",
+    classes: "nhsuk-u-margin-top-0 nhsuk-u-margin-bottom-4"
+  }) }}
+
+  <h1>{{ pageHeading }}</h1>
+
+  {% set breastDensityFactorsHtml %}
+    {% include "_includes/forms/breast-density-factors.njk" %}
+  {% endset %}
+
+  {{ card({
+    heading: "Breast density factors",
+    headingLevel: "2",
+    feature: true,
+    descriptionHtml: breastDensityFactorsHtml
+  }) }}
+
+  <div class="nhsuk-form-group">
+    {{ button({
+      text: "Continue",
+      href: "../check-information" | getReturnUrl(referrerChain)
+    }) }}
+  </div>
+
+{% endblock %}
diff --git a/app/views/appointments/confirm-information/other-relevant-information.html b/app/views/appointments/confirm-information/other-relevant-information.html
index 8b4a3761..a72a2be8 100644
--- a/app/views/appointments/confirm-information/other-relevant-information.html
+++ b/app/views/appointments/confirm-information/other-relevant-information.html
@@ -2,7 +2,7 @@
 
 {% extends 'layout-appointment.html' %}
 
-{% set pageHeading = "Review other relevant information" %}
+{% set pageHeading = "Review other medical information" %}
 {% set showNavigation = false %}
 {% set activeWorkflowStep = 'check-information' %}
 {% set hideBackLink = true %}
@@ -11,7 +11,7 @@
 
 {% set gridColumn = "nhsuk-grid-column-full" %}
 
-{% set scrollTo = "other-relevant-information" %}
+{% set scrollTo = "other-medical-information" %}
 
 {% block pageContent %}
 
@@ -24,19 +24,17 @@
 
   <h1>{{ pageHeading }}</h1>
 
-  {# Include the full other relevant information summary in a feature card #}
-  {% set otherRelevantInformationHtml %}
+  {% set otherMedicalInformationHtml %}
     {% include "_includes/summary-lists/medical-information/other-relevant-information.njk" %}
   {% endset %}
 
   {{ card({
-    heading: "Other relevant medical information",
+    heading: "Other medical information",
     headingLevel: "2",
     feature: true,
-    descriptionHtml: otherRelevantInformationHtml
+    descriptionHtml: otherMedicalInformationHtml
   }) }}
 
-  {# Continue button back to check information #}
   <div class="nhsuk-form-group">
     {{ button({
       text: "Continue",
diff --git a/app/views/appointments/medical-information/hormone-replacement-therapy.html b/app/views/appointments/medical-information/hormone-replacement-therapy.html
deleted file mode 100644
index 049fab23..00000000
--- a/app/views/appointments/medical-information/hormone-replacement-therapy.html
+++ /dev/null
@@ -1,115 +0,0 @@
-{# app/views/appointments/medical-information/hormone-replacement-therapy.html #}
-
-{% extends parentLayout or 'layout-appointment.html' %}
-
-{% set pageHeading = "Hormone replacement therapy (HRT)" %}
-
-{% set showBackLink = true %}
-{# 
-{% set gridColumn = "nhsuk-grid-column-two-thirds" %} #}
-
-{% set formAction = './../review-medical-information' | getReturnUrl(referrerChain) %}
-
-{# {% set back = {
-  href: "/clinics/" + clinicId,
-  text: "Back to clinic"
-} %}
- #}
-
-{% block pageContent %}
-
-  {# <h1 class="nhsuk-heading-l">
-    <span class="nhsuk-caption-l">
-      {{ participant | getFullName }}
-    </span>
-    {{ pageHeading }}
-  </h1> #}
-
-  {% set currentlyTakingHtml %}
-
-    {{ input({
-      name: "appointment[medicalInformation][hrt][hrtDateStarted]",
-      value: appointment.medicalInformation.hrt.hrtDateStarted,
-      label: {
-        text: "Approximate date started"
-      },
-      classes: "nhsuk-u-width-two-thirds",
-      hint: {
-        text: "For example, " ~ (now() | remove(18, "months") | formatDate("MMMM YYYY"))
-      }
-    }) }}
-
-  {% endset %}
-
-  {% set recentlyStoppedHtml %}
-
-    {{ input({
-      name: "appointment[medicalInformation][hrt][hrtDateStopped]",
-      value: appointment.medicalInformation.hrt.hrtDateStopped,
-      label: {
-        text: "Approximate date stopped"
-      },
-      classes: "nhsuk-u-width-two-thirds",
-      hint: {
-        text: "For example, " ~ (now() | remove(2, "months") | formatDate("MMMM YYYY"))
-      }
-    }) }}
-
-    {{ input({
-      name: "appointment[medicalInformation][hrt][hrtDurationBeforeStopping]",
-      value: appointment.medicalInformation.hrt.hrtDurationBeforeStopping,
-      label: {
-        text: "Approximate time taken for"
-      },
-      classes: "nhsuk-u-width-two-thirds",
-      hint: {
-        text: "For example, 5 years"
-      }
-    }) }}
-
-  {% endset %}
-
-  <span class="nhsuk-caption-l">
-    {{ participant | getShortName }}
-  </span>
-  {{ radios({
-    name: "appointment[medicalInformation][hrt][hrtQuestion]",
-    idPrefix: "hrtQuestion",
-    value: appointment.medicalInformation.hrt.hrtQuestion,
-    fieldset: {
-      legend: {
-        text: "Is " + (participant | getShortName) + " currently taking HRT?",
-        size: "l",
-        isPageHeading: true
-      }
-    },
-    items: [
-    {
-      value: "yes",
-      text: "Yes",
-      conditional: {
-        html: currentlyTakingHtml
-      }
-    },
-    {
-      value: "no-recently-stopped",
-      text: "No, but stopped recently",
-      conditional: {
-        html: recentlyStoppedHtml
-      }
-    },
-    {
-      value: "no",
-      text: "No"
-    }
-  ]
-  }) }}
-
-  {{ button({
-    text: "Continue"
-  }) }}
-
-  {% include "screening-cannot-proceed-link.njk" %}
-
-{% endblock %}
-
diff --git a/app/views/appointments/medical-information/pregnancy-and-breastfeeding.html b/app/views/appointments/medical-information/pregnancy-and-breastfeeding.html
deleted file mode 100644
index a3d02d9b..00000000
--- a/app/views/appointments/medical-information/pregnancy-and-breastfeeding.html
+++ /dev/null
@@ -1,166 +0,0 @@
-
-{% extends parentLayout or 'layout-appointment.html' %}
-
-{% set pageHeading = "Pregnancy and breastfeeding" %}
-
-{% set gridColumn = "nhsuk-grid-column-two-thirds" %}
-
-{% set formAction = "./../review-medical-information" | getReturnUrl(referrerChain, query.scrollTo) %}
-
-{# {% set back = {
-  href: "/clinics/" + clinicId,
-  text: "Back to clinic"
-} %}
- #}
-
-{% block pageContent %}
-
-  {% set unit = data.breastScreeningUnits | findById(clinic.breastScreeningUnitId) %}
-
-  <h1 class="nhsuk-heading-l">
-    <span class="nhsuk-caption-l">
-      {{ participant | getFullName }}
-    </span>
-    {{ pageHeading }}
-  </h1>
-
-  {% set currentlyPregnant %}
-    {{ input({
-      name: "appointment[medicalInformation][pregnancyAndBreastfeeding][pregnancyDueDate]",
-      value: appointment.medicalInformation.pregnancyAndBreastfeeding.pregnancyDueDate,
-      label: {
-        text: "Approximate due date"
-      },
-      classes: "nhsuk-u-width-two-thirds",
-      hint: {
-        text: "For example, "  ~ (now() | add(3, "months") | formatDate("MMMM YYYY"))
-      }
-    } ) }}
-  {% endset %}
-
-  {% set recentlyPregnant %}
-    {{ input({
-      name: "appointment[medicalInformation][pregnancyAndBreastfeeding][pregnancyEndDate]",
-      value: appointment.medicalInformation.pregnancyAndBreastfeeding.pregnancyEndDate,
-      label: {
-        text: "Approximate date pregnancy ended"
-      },
-      classes: "nhsuk-u-width-two-thirds",
-      hint: {
-        text: "For example, " ~ (now() | remove(2, "months") | formatDate("MMMM YYYY"))
-      }
-    } ) }}
-  {% endset %}
-
-  {% set currentlyBreastfeeding %}
-    {{ input({
-      name: "appointment[medicalInformation][pregnancyAndBreastfeeding][breastfeedingStartDate]",
-      value: appointment.medicalInformation.pregnancyAndBreastfeeding.breastfeedingStartDate,
-      label: {
-        text: "Approximate date started"
-      },
-      classes: "nhsuk-u-width-two-thirds",
-      hint: {
-        text: "For example, since " ~ (now() | remove(2, "months") | formatDate("MMMM YYYY"))
-      }
-    } ) }}
-  {% endset %}
-
-  {% set recentlyBreastfeeding %}
-    {{ input({
-      name: "appointment[medicalInformation][pregnancyAndBreastfeeding][breastfeedingStopDate]",
-      value: appointment.medicalInformation.pregnancyAndBreastfeeding.breastfeedingStopDate,
-      label: {
-        text: "Approximate date stopped"
-      },
-      classes: "nhsuk-u-width-two-thirds",
-      hint: {
-        text: "For example, " ~ (now() | remove(3, "months") | formatDate("MMMM YYYY"))
-      }
-    } ) }}
-  {% endset %}
-
-  {{ radios({
-    name: "appointment[medicalInformation][pregnancyAndBreastfeeding][pregnancyStatus]",
-    value: appointment.medicalInformation.pregnancyAndBreastfeeding.pregnancyStatus,
-    fieldset: {
-      legend: {
-        text: "Is " + (participant | getFullName) + " pregnant?",
-        size: "m",
-        isPageHeading: false
-      }
-    },
-    items: [
-    {
-      value: "yes",
-      text: "Yes",
-      conditional: {
-        html: currentlyPregnant
-      }
-    },
-    {
-      value: "noButRecently",
-      text: "No, but has been recently",
-      conditional: {
-        html: recentlyPregnant
-      }
-    },
-    {
-      divider: "or"
-    },
-    {
-      value: "noNotPregnant",
-      text: "No",
-      conditional: {
-        html: notPregnant
-      }
-    }
-  ]
-  } ) }}
-
-  {{ radios({
-    name: "appointment[medicalInformation][pregnancyAndBreastfeeding][breastfeedingStatus]",
-    value: appointment.medicalInformation.pregnancyAndBreastfeeding.breastfeedingStatus,
-     fieldset: {
-      legend: {
-        text: "Are they currently breastfeeding?",
-        size: "m",
-        isPageHeading: false
-      }
-    },
-    items: [
-    {
-      value: "yes",
-      text: "Yes",
-      conditional: {
-        html: currentlyBreastfeeding
-      }
-    },
-    {
-      value: "recentlyStopped",
-      text: "No, but stopped recently",
-      conditional: {
-        html: recentlyBreastfeeding
-      }
-    },
-    {
-      divider: "or"
-    },
-    {
-      value: "no",
-      text: "No",
-      conditional: {
-        html: notBreastfeeding
-      }
-    }
-  ]
-  } ) }}
-
-  {{ button({
-    text: "Continue"
-  }) }}
-
-  {% include "screening-cannot-proceed-link.njk" %}
-
-{% endblock %}
-
diff --git a/app/views/index.html b/app/views/index.html
index 072fefc0..eb5234f3 100755
--- a/app/views/index.html
+++ b/app/views/index.html
@@ -147,10 +147,7 @@ <h3>Appointment during workflow</h3>
         <a href="{{ startUrl }}?returnTo=medical-information/record-breast-features&{{ completedSections }}">Record breast features</a>
       </li>
       <li>
-        <a href="{{ startUrl }}?returnTo=medical-information/hormone-replacement-therapy?{{ completedSections }}&referrerChain={{ exampleParticipant }}/review-medical-information">Hormone replacement therapy</a>
-      </li>
-      <li>
-        <a href="{{ startUrl }}?returnTo=medical-information/pregnancy-and-breastfeeding&{{ completedSections }}&referrerChain={{ exampleParticipant }}/review-medical-information">Pregnancy and breastfeeding</a>
+        <a href="{{ startUrl }}?returnTo=confirm-information/breast-density-factors&{{ completedSections }}&referrerChain={{ exampleParticipant }}/review-medical-information">Breast density factors</a>
       </li>
     </ul>
   </li>
diff --git a/app/views/settings/seed-profiles/custom.html b/app/views/settings/seed-profiles/custom.html
index 28c16d38..87680e9b 100644
--- a/app/views/settings/seed-profiles/custom.html
+++ b/app/views/settings/seed-profiles/custom.html
@@ -80,7 +80,7 @@ <h2>Reading backlog</h2>
 
     <h2>Medical information</h2>
     {{ seedProfilePercentageInput({ id: "probabilityOfSymptoms", name: "settings[seedProfiles][customForm][medicalInformation][probabilityOfSymptoms]", label: "Symptoms present", value: formProfile.medicalInformation.probabilityOfSymptoms * 100 }) }}
-    {{ seedProfilePercentageInput({ id: "probabilityOfHRT", name: "settings[seedProfiles][customForm][medicalInformation][probabilityOfHRT]", label: "Hormone replacement therapy", value: formProfile.medicalInformation.probabilityOfHRT * 100 }) }}
+    {{ seedProfilePercentageInput({ id: "probabilityOfHRT", name: "settings[seedProfiles][customForm][medicalInformation][probabilityOfHRT]", label: "Taking HRT", value: formProfile.medicalInformation.probabilityOfHRT * 100 }) }}
     {{ seedProfilePercentageInput({ id: "probabilityOfPregnancyBreastfeeding", name: "settings[seedProfiles][customForm][medicalInformation][probabilityOfPregnancyBreastfeeding]", label: "Pregnancy or breastfeeding", value: formProfile.medicalInformation.probabilityOfPregnancyBreastfeeding * 100 }) }}
     {{ seedProfilePercentageInput({ id: "probabilityOfOtherMedicalInfo", name: "settings[seedProfiles][customForm][medicalInformation][probabilityOfOtherMedicalInfo]", label: "Other medical information", value: formProfile.medicalInformation.probabilityOfOtherMedicalInfo * 100 }) }}
     {{ seedProfilePercentageInput({ id: "probabilityOfBreastFeatures", name: "settings[seedProfiles][customForm][medicalInformation][probabilityOfBreastFeatures]", label: "Breast features", value: formProfile.medicalInformation.probabilityOfBreastFeatures * 100 }) }}
diff --git a/docs/DATA-GENERATOR-REFERENCE.md b/docs/DATA-GENERATOR-REFERENCE.md
index d454277a..b1d09af8 100644
--- a/docs/DATA-GENERATOR-REFERENCE.md
+++ b/docs/DATA-GENERATOR-REFERENCE.md
@@ -28,8 +28,7 @@ generate-seed-data.js (main orchestrator)
   │     │
   │     └─> medical-information-generator.js (for completed appointments only)
   │           ├─> symptoms-generator.js
-  │           ├─> hrt-generator.js
-  │           ├─> pregnancy-and-breastfeeding-generator.js
+  │           ├─> breast-density-factors-generator.js
   │           ├─> other-medical-information-generator.js
   │           ├─> breast-features-generator.js
   │           └─> medical-history-generator.js
@@ -311,7 +310,9 @@ For complex data with multiple sub-generators, use an umbrella generator to orch
 // app/lib/generators/medical-information-generator.js
 
 const { generateSymptoms } = require('./medical-information/symptoms-generator')
-const { generateHRT } = require('./medical-information/hrt-generator')
+const {
+  generateBreastDensityFactors
+} = require('./medical-information/breast-density-factors-generator')
 // ... other generators
 
 const generateMedicalInformation = (options = {}) => {
@@ -335,13 +336,12 @@ const generateMedicalInformation = (options = {}) => {
     medicalInfo.symptoms = symptoms
   }
 
-  const hrt = generateHRT({
-    probability: probabilityOfHRT
+  // Sub-generators can return several keys at once, merged into the parent object
+  const breastDensityFactors = generateBreastDensityFactors({
+    probabilityOfHrt: probabilityOfHRT
   })
 
-  if (hrt) {
-    medicalInfo.hrt = hrt
-  }
+  Object.assign(medicalInfo, breastDensityFactors)
 
   // Only return if we generated anything
   return medicalInfo
@@ -484,7 +484,7 @@ app/lib/generators/
 ├── medical-information-generator.js  # Umbrella generator
 ├── medical-information/              # Sub-generators
 │   ├── symptoms-generator.js
-│   ├── hrt-generator.js
+│   ├── breast-density-factors-generator.js
 │   └── medical-history-generator.js
 └── [new]-generator.js                # New generators here
 ```
diff --git a/docs/MEDICAL-INFORMATION-GENERATOR-GUIDE.md b/docs/MEDICAL-INFORMATION-GENERATOR-GUIDE.md
index 0a4a0ac2..08e9bf68 100644
--- a/docs/MEDICAL-INFORMATION-GENERATOR-GUIDE.md
+++ b/docs/MEDICAL-INFORMATION-GENERATOR-GUIDE.md
@@ -8,8 +8,7 @@ The prototype generates seed data to populate a breast screening management syst
 
 - **Medical history** (breast cancer, mastectomy, implants, etc.) - ✅ _implemented (4 of 7 types)_
 - **Symptoms** (lumps, pain, nipple changes, etc.) - ✅ _implemented_
-- **HRT** - ✅ _implemented_
-- **Pregnancy and breastfeeding** - ✅ _implemented_
+- **Breast density factors** (HRT, pregnancy, breastfeeding) - ✅ _implemented_
 - **Other medical information** (freetext) - ✅ _implemented_
 - **Breast features** (moles, scars, etc.) - ✅ _implemented_
 
@@ -37,8 +36,8 @@ appointment: {
   participantId: string,
   medicalInformation: {
     symptoms: [],                    // ✅ Array of symptom objects
-    hrt: {},                         // ✅ HRT information
-    pregnancyAndBreastfeeding: {},   // ✅ Pregnancy and breastfeeding status
+    breastDensityFactorsHrt: string, // ✅ 'yes' or 'no' - absent if not asked
+    breastDensityFactors: [],        // ✅ Any of 'pregnant', 'breastfeeding' - absent if none
     otherMedicalInformation: string, // ✅ Freetext medical info
     breastFeatures: [],              // ✅ Array of breast feature objects
     medicalHistory: {                // Object with arrays for each type
@@ -69,10 +68,10 @@ app/lib/generators/
 ├── medical-information-generator.js              # ✅ Umbrella generator for all medical info
 ├── medical-information/                          # ✅ Subfolder for medical info generators
 │   ├── symptoms-generator.js                     # ✅ Generates symptoms
-│   ├── hrt-generator.js                          # ✅ Generates HRT data
-│   ├── pregnancy-and-breastfeeding-generator.js  # ✅ Generates pregnancy/breastfeeding data
+│   ├── breast-density-factors-generator.js       # ✅ Generates HRT, pregnancy and breastfeeding data
 │   ├── other-medical-information-generator.js    # ✅ Generates freetext medical info
-│   └── breast-features-generator.js              # ✅ Generates breast features
+│   ├── breast-features-generator.js              # ✅ Generates breast features
+│   └── medical-history-generator.js              # ✅ Generates medical history
 ├── special-appointment-generator.js
 └── [new]-generator.js                            # Your new generator here
 ```
@@ -184,58 +183,38 @@ module.exports = {
 
 **Integration:** Called from umbrella generator for completed appointments only.
 
-### HRT Generator
+### Breast density factors generator
 
-**File:** `app/lib/generators/medical-information/hrt-generator.js`
+**File:** `app/lib/generators/medical-information/breast-density-factors-generator.js`
+
+Replaces the separate HRT and pregnancy/breastfeeding generators. The question is now a simple yes/no for HRT plus a checkbox group for pregnancy and breastfeeding, so the generated data is just as simple.
 
 **Key features:**
 
-- Generates HRT (hormone replacement therapy) information
-- Three status options: currently taking, recently stopped, or no HRT
-- Conditional fields populate based on status
-- 30% default probability of having HRT data
+- Generates the factors that affect breast density: HRT, pregnancy and breastfeeding
+- 80% default probability the question was asked at all — if it wasn't, `breastDensityFactorsHrt` is left unset, so summaries can distinguish “not answered” from a recorded “no”
+- 30% default probability of currently taking HRT
+- 5% default probability of being pregnant or breastfeeding (appropriate for the screening age group), split 70/30 towards breastfeeding
+- Returns a plain object of keys the umbrella generator merges with `Object.assign`, rather than a nested sub-object
 
-**Data structure:**
+**Options:**
 
 ```javascript
-{
-  hrtQuestion: 'yes' | 'no-recently-stopped' | 'no',
-  // If 'yes':
-  hrtDateStarted: string,                 // e.g., 'September 2022'
-  // If 'no-recently-stopped':
-  hrtDateStopped: string,                 // e.g., 'January 2026'
-  hrtDurationBeforeStopping: string       // e.g., '5 years'
-}
+generateBreastDensityFactors({
+  probabilityOfHrt: 0.3,                      // Chance of currently taking HRT
+  probabilityOfPregnancyBreastfeeding: 0.05,  // Chance of being pregnant or breastfeeding
+  probabilityOfBeingAsked: 0.8                // Chance the question was asked at all
+})
 ```
 
-**Integration:** Called from umbrella generator for completed appointments only.
-
-### Pregnancy and Breastfeeding Generator
-
-**File:** `app/lib/generators/medical-information/pregnancy-and-breastfeeding-generator.js`
-
-**Key features:**
-
-- Generates pregnancy and breastfeeding status
-- Smart logic: if pregnant → not breastfeeding; if recently pregnant → likely breastfeeding
-- Conditional fields populate based on status
-- 5% default probability (appropriate for screening age group)
-
 **Data structure:**
 
 ```javascript
 {
-  pregnancyStatus: 'yes' | 'noButRecently' | 'noNotPregnant',
-  // If 'yes':
-  pregnancyDueDate: string,               // e.g., 'June 2026'
-  // If 'noButRecently':
-  pregnancyEndDate: string,               // e.g., 'January 2026'
-
-  breastfeedingStatus: 'yes' | 'recentlyStopped' | 'no',
-  // If 'yes':
-  breastfeedingStartDate: string,         // e.g., 'January 2026'
-  // If 'recentlyStopped':
-  breastfeedingStopDate: string           // e.g., 'December 2025'
+  // Absent if the question wasn't asked
+  breastDensityFactorsHrt: 'yes' | 'no',
+  // Absent if neither applies
+  breastDensityFactors: ['pregnant' | 'breastfeeding']
 }
 ```
 
@@ -426,10 +405,9 @@ if (isCompleted(appointmentStatus)) {
 // app/lib/generators/medical-information-generator.js
 
 const { generateSymptoms } = require('./medical-information/symptoms-generator')
-const { generateHRT } = require('./medical-information/hrt-generator')
 const {
-  generatePregnancyAndBreastfeeding
-} = require('./medical-information/pregnancy-and-breastfeeding-generator')
+  generateBreastDensityFactors
+} = require('./medical-information/breast-density-factors-generator')
 const {
   generateOtherMedicalInformation
 } = require('./medical-information/other-medical-information-generator')
@@ -445,8 +423,8 @@ const {
  * @param {object} options - Generation options
  * @param {string} [options.addedByUserId] - User ID who collected this information
  * @param {number} [options.probabilityOfSymptoms=0.85] - Chance of having symptoms
- * @param {number} [options.probabilityOfHRT=0.30] - Chance of having HRT data
- * @param {number} [options.probabilityOfPregnancyBreastfeeding=0.05] - Chance of pregnancy/breastfeeding
+ * @param {number} [options.probabilityOfHRT=0.30] - Chance of currently taking HRT
+ * @param {number} [options.probabilityOfPregnancyBreastfeeding=0.05] - Chance of being pregnant or breastfeeding
  * @param {number} [options.probabilityOfOtherMedicalInfo=0.15] - Chance of other medical info
  * @param {number} [options.probabilityOfBreastFeatures=0.20] - Chance of having breast features
  * @param {object} [options.config] - Participant config for overrides
@@ -475,23 +453,14 @@ const generateMedicalInformation = (options = {}) => {
     medicalInfo.symptoms = symptoms
   }
 
-  // Generate HRT information
-  const hrt = generateHRT({
-    probability: probabilityOfHRT
+  // Generate breast density factors (HRT, pregnancy, breastfeeding)
+  // This generator returns top-level keys, so its result is merged in
+  const breastDensityFactors = generateBreastDensityFactors({
+    probabilityOfHrt: probabilityOfHRT,
+    probabilityOfPregnancyBreastfeeding
   })
 
-  if (hrt) {
-    medicalInfo.hrt = hrt
-  }
-
-  // Generate pregnancy and breastfeeding information
-  const pregnancyAndBreastfeeding = generatePregnancyAndBreastfeeding({
-    probability: probabilityOfPregnancyBreastfeeding
-  })
-
-  if (pregnancyAndBreastfeeding) {
-    medicalInfo.pregnancyAndBreastfeeding = pregnancyAndBreastfeeding
-  }
+  Object.assign(medicalInfo, breastDensityFactors)
 
   // Generate other medical information
   const otherMedicalInformation = generateOtherMedicalInformation({
@@ -1219,6 +1188,8 @@ if (isCompleted(appointmentStatus)) {
    - Smart conditional logic (pregnant → not breastfeeding, etc.)
    - Data matches form structure exactly
 
+   _Both of these were later replaced by the breast density factors generator when the questions were redesigned into a single yes/no plus a checkbox group._
+
 8. ✅ **Implemented other medical information generator:**
    - Created `app/lib/generators/medical-information/other-medical-information-generator.js`
    - 15% default probability
@@ -1255,8 +1226,7 @@ if (isCompleted(appointmentStatus)) {
 
 - `app/lib/generators/medical-information-generator.js` - ✅ Umbrella generator (orchestrator)
 - `app/lib/generators/medical-information/symptoms-generator.js` - ✅ Symptoms generator
-- `app/lib/generators/medical-information/hrt-generator.js` - ✅ HRT generator
-- `app/lib/generators/medical-information/pregnancy-and-breastfeeding-generator.js` - ✅ Pregnancy/breastfeeding generator
+- `app/lib/generators/medical-information/breast-density-factors-generator.js` - ✅ Breast density factors generator (HRT, pregnancy, breastfeeding)
 - `app/lib/generators/medical-information/other-medical-information-generator.js` - ✅ Other medical info generator
 - `app/lib/generators/medical-information/breast-features-generator.js` - ✅ Breast features generator
 - `app/lib/generators/medical-information/medical-history-generator.js` - ✅ Medical history generator (4 of 7 types)
@@ -1268,8 +1238,8 @@ if (isCompleted(appointmentStatus)) {
 ### Routes & Views (for reference)
 
 - `app/routes/appointments.js` - Routes that handle medical information (shows expected data structure)
-- `app/views/appointments/medical-information/hormone-replacement-therapy.html` - HRT form template
-- `app/views/appointments/medical-information/pregnancy-and-breastfeeding.html` - Pregnancy/breastfeeding form template
+- `app/views/_includes/forms/breast-density-factors.njk` - Breast density factors form fields
+- `app/views/appointments/confirm-information/breast-density-factors.html` - Breast density factors edit and review page
 - `app/views/appointments/medical-information/other-medical-information.html` - Other medical info form template
 - `app/views/appointments/medical-information/record-breast-features.html` - Breast features diagram interface
 - `app/views/appointments/medical-information/medical-history/*.html` - Medical history form templates
diff --git a/docs/utils-filter-reference.md b/docs/utils-filter-reference.md
index 922b21f6..c89c0756 100644
--- a/docs/utils-filter-reference.md
+++ b/docs/utils-filter-reference.md
@@ -3,7 +3,7 @@
 ---
 **Auto-generated** — do not edit manually.
 
-- **Generated:** 2026-07-15 11:33 UTC
+- **Generated:** 2026-08-03 09:24 UTC
 - **Source:** `app/lib/utils/` and `app/filters/`
 - **Regenerate:** `npm run docs`
 
@@ -21,24 +21,24 @@
 | `participants.js` | Participant lookups and derived data: full/short names, age, clinic history, and risk level. | 144 |
 | `appointment-data.js` | Appointment lookups and mutations in session data | 164 |
 | `episodes.js` | Episode lookups and stage changes | 178 |
-| `clinics.js` | Clinic filtering by time period, slot formatting, and opening hours calculation. | 208 |
-| `reading.js` | Image reading workflow: read state, progress tracking, batch management, per-user navigation, and filtering | 223 |
-| `prior-mammograms.js` | Prior mammogram request state (awaiting, unrequested, resolved) and one-line summary helpers. | 279 |
-| `medical-information.js` | Summarise medical history items, symptoms, breast features, and other clinical information into concise display strings. | 298 |
-| `annotation-summary.js` | Summarise image reading annotations (abnormality type, level of concern, location) into concise display strings. | 319 |
-| `arrays.js` | Array helpers: find by key/id, filter, push (immutable), remove empty | 332 |
-| `objects.js` | Object utilities for extracting and flattening values. | 350 |
-| `summary-list.js` | NHS summary list helpers: replace empty row values with "Enter X" links or "Not provided" text, and remove the bottom border from the last row. | 360 |
-| `random.js` | Seeded random functions for stable prototype data | 371 |
-| `referrers.js` | Referrer chain navigation for multi-level back links | 388 |
-| `roles-and-permissions.js` | User role checks | 401 |
-| `utility.js` | General-purpose type coercion (`falsify`) and limiting utilities. | 419 |
+| `clinics.js` | Clinic filtering by time period, slot formatting, and opening hours calculation. | 209 |
+| `reading.js` | Image reading workflow: read state, progress tracking, batch management, per-user navigation, and filtering | 224 |
+| `prior-mammograms.js` | Prior mammogram request state (awaiting, unrequested, resolved) and one-line summary helpers. | 280 |
+| `medical-information.js` | Summarise medical history items, symptoms, breast features, and other clinical information into concise display strings. | 299 |
+| `annotation-summary.js` | Summarise image reading annotations (abnormality type, level of concern, location) into concise display strings. | 322 |
+| `arrays.js` | Array helpers: find by key/id, filter, push (immutable), remove empty | 335 |
+| `objects.js` | Object utilities for extracting and flattening values. | 353 |
+| `summary-list.js` | NHS summary list helpers: replace empty row values with "Enter X" links or "Not provided" text, and remove the bottom border from the last row. | 363 |
+| `random.js` | Seeded random functions for stable prototype data | 374 |
+| `referrers.js` | Referrer chain navigation for multi-level back links | 391 |
+| `roles-and-permissions.js` | User role checks | 404 |
+| `utility.js` | General-purpose type coercion (`falsify`) and limiting utilities. | 422 |
 | | | |
-| `formatting.js` | Display formatting for yes/no answers and ordinal names. (filter only) | 435 |
-| `forms.js` | Injects matching flash error messages into NHS form component configs by field name. (filter only) | 447 |
-| `nunjucks.js` | Nunjucks-specific helpers: joining arrays, resolving user names from IDs, template debugging, and template literal support. (filter only) | 459 |
-| `tags.js` | Convert status strings to NHS `<strong class="nhsuk-tag">` HTML elements. (filter only) | 473 |
-| `markdown.js` | Convert markdown strings to Nunjucks-safe HTML using markdown-it (filter only) | 483 |
+| `formatting.js` | Display formatting for yes/no answers and ordinal names. (filter only) | 438 |
+| `forms.js` | Injects matching flash error messages into NHS form component configs by field name. (filter only) | 450 |
+| `nunjucks.js` | Nunjucks-specific helpers: joining arrays, resolving user names from IDs, template debugging, and template literal support. (filter only) | 462 |
+| `tags.js` | Convert status strings to NHS `<strong class="nhsuk-tag">` HTML elements. (filter only) | 476 |
+| `markdown.js` | Convert markdown strings to Nunjucks-safe HTML using markdown-it (filter only) | 486 |
 
 ---
 
@@ -134,12 +134,12 @@ Appointment status checks and display helpers. Use these instead of comparing st
 | `isActive(input)` | Check if a status represents an active appointment | 134 |
 | `isAppointmentWorkflow(appointment, currentUser)` | Check if an appointment is in the appointment workflow for the current user | 146 |
 | `eligibleForReading(appointment)` | Check if a status indicates reading is eligible | 178 |
-| `getStatusTagColour(status, [vocabulary])` | Map a status key to its NHS tag colour string — e.g. `getStatusTagColour('complete', 'appointment') // 'green'` | 309 |
-| `getStatusText(status, [vocabulary])` | Map a status key to its display text — e.g. `getStatusText('complete', 'appointment') // 'Screened'` | 323 |
-| `filterAppointmentsByStatus(appointments, filter)` | Filter appointments by status category | 337 |
-| `isSpecialAppointment(appointment)` | Check if an appointment is a special appointment | 365 |
-| `hasAppointmentNote(appointment)` | Check if an appointment has an appointment note | 375 |
-| `hasSymptoms(appointment)` | Check if an appointment has recorded symptoms | 385 |
+| `getStatusTagColour(status, [vocabulary])` | Map a status key to its NHS tag colour string — e.g. `getStatusTagColour('complete', 'appointment') // 'green'` | 313 |
+| `getStatusText(status, [vocabulary])` | Map a status key to its display text — e.g. `getStatusText('complete', 'appointment') // 'Screened'` | 327 |
+| `filterAppointmentsByStatus(appointments, filter)` | Filter appointments by status category | 341 |
+| `isSpecialAppointment(appointment)` | Check if an appointment is a special appointment | 369 |
+| `hasAppointmentNote(appointment)` | Check if an appointment has an appointment note | 379 |
+| `hasSymptoms(appointment)` | Check if an appointment has recorded symptoms | 389 |
 
 ### participants.js
 
@@ -183,27 +183,28 @@ Episode lookups and stage changes. An episode is one screening round - the conta
 
 | Function | Description | Line |
 |---|---|---|
-| `appointmentProducedImages(appointment)` | Whether an appointment's status means mammograms were taken. | 89 |
-| `buildMammogramEntry(appointment, [clinic])` | Build the episode's summary record of one set of mammograms. | 103 |
-| `getEpisode(data, episodeId)` | Get an episode by ID | 144 |
-| `getEpisodesForParticipant(data, participantId)` | Get all of a participant's episodes, oldest first | 165 |
-| `getCurrentEpisode(data, participantId)` | Get a participant's current episode - their most recent one that hasn't | 195 |
-| `getEpisodeAppointments(data, episode)` | Get an episode's appointments, oldest first | 211 |
-| `getEpisodeReadingStatus(data, episode, [userId])` | Get the reading status of an episode, derived from its appointments. | 226 |
-| `isEpisodeClosed(episode)` | Whether an episode has closed | 241 |
-| `isEpisodeOpen(episode)` | Whether an episode is still open - anything that hasn't closed, whatever | 251 |
-| `getEpisodeMammogramDate(episode)` | When this round's mammograms were taken, from the episode's own record. | 262 |
-| `getLastMammogram(data, participantId)` | The participant's last mammogram on record, before today. | 277 |
-| `getNextAppointment(data, participantId)` | The participant's next booked appointment, if they have one. | 324 |
-| `getEpisodeStageText(stage)` | Display text for an episode's stage | 343 |
-| `getEpisodeStageTagColour(stage)` | Tag colour for an episode's stage | 353 |
-| `getEpisodeOutcomeText(outcome)` | Display text for an episode's outcome | 363 |
-| `getEpisodeOutcomeTagColour(outcome)` | Tag colour for an episode's outcome | 373 |
-| `updateEpisode(data, episodeId, updates)` | Update an episode, persisting the change for this session. | 383 |
-| `updateEpisodeStage(data, episodeId, stage, [options])` | Advance an episode to a new stage, appending to its stageHistory. | 416 |
-| `syncEpisodeMammogramsForAppointment(data, appointment)` | Keep an episode's mammograms record in step with one of its appointments. | 465 |
-| `advanceEpisodeForAppointmentStatus(data, appointment)` | Move an appointment's episode to wherever the appointment's status leaves it. | 505 |
-| `advanceEpisodeForReadingOutcome(data, appointment, readingOutcome)` | Move an appointment's episode to wherever its reading outcome leaves it. | 538 |
+| `appointmentProducedImages(appointment)` | Whether an appointment's status means mammograms were taken. | 91 |
+| `buildMammogramEntry(appointment, [clinic])` | Build the episode's summary record of one set of mammograms. | 105 |
+| `getEpisode(data, episodeId)` | Get an episode by ID | 146 |
+| `getEpisodesForParticipant(data, participantId)` | Get all of a participant's episodes, oldest first | 167 |
+| `getCurrentEpisode(data, participantId)` | Get a participant's current episode - their most recent one that hasn't | 197 |
+| `getEpisodeAppointments(data, episode)` | Get an episode's appointments, oldest first | 213 |
+| `getEpisodeReadingStatus(data, episode, [userId])` | Get the reading status of an episode, derived from its appointments. | 228 |
+| `isEpisodeClosed(episode)` | Whether an episode has closed | 243 |
+| `isEpisodeOpen(episode)` | Whether an episode is still open - anything that hasn't closed, whatever | 253 |
+| `getEpisodeMammogramDate(episode)` | When this round's mammograms were taken, from the episode's own record. | 264 |
+| `getLastMammogram(data, participantId)` | The participant's last mammogram on record, before today. | 279 |
+| `getNextAppointment(data, participantId)` | The participant's next booked appointment, if they have one. | 326 |
+| `getEpisodeLabel(episode)` | Human name for an episode. Episodes are named by date, not number - | 352 |
+| `getEpisodeStageText(stage)` | Display text for an episode's stage | 368 |
+| `getEpisodeStageTagColour(stage)` | Tag colour for an episode's stage | 378 |
+| `getEpisodeOutcomeText(outcome)` | Display text for an episode's outcome | 388 |
+| `getEpisodeOutcomeTagColour(outcome)` | Tag colour for an episode's outcome | 398 |
+| `updateEpisode(data, episodeId, updates)` | Update an episode, persisting the change for this session. | 408 |
+| `updateEpisodeStage(data, episodeId, stage, [options])` | Advance an episode to a new stage, appending to its stageHistory. | 441 |
+| `syncEpisodeMammogramsForAppointment(data, appointment)` | Keep an episode's mammograms record in step with one of its appointments. | 490 |
+| `advanceEpisodeForAppointmentStatus(data, appointment)` | Move an appointment's episode to wherever the appointment's status leaves it. | 530 |
+| `advanceEpisodeForReadingOutcome(data, appointment, readingOutcome)` | Move an appointment's episode to wherever its reading outcome leaves it. | 563 |
 
 ### clinics.js
 
@@ -303,18 +304,20 @@ Summarise medical history items, symptoms, breast features, and other clinical i
 
 | Function | Description | Line |
 |---|---|---|
-| `isValidMedicalHistoryType(type)` | Check whether a string names a medical history type, by type or slug | 5 |
-| `getMedicalHistoryType(type)` | Get a medical history type object, by type or slug | 17 |
-| `getMedicalHistoryKeyFromSlug(slug)` | Get the camelCase data key for a medical history type from its slug | 30 |
-| `summariseMedicalHistoryItem(item)` | Summarise a single medical history item into a concise string | 41 |
-| `summariseMedicalHistory(medicalHistory)` | Summarise all medical history items into an array of summary strings | 214 |
-| `getMedicalHistoryItems(medicalHistory)` | Get all medical history items as a flat array | 243 |
-| `countMedicalHistoryItems(medicalHistory)` | Count total number of medical history items | 265 |
-| `summariseSymptom(symptom)` | Summarise a single symptom into a concise string | 287 |
-| `summariseSymptoms(symptoms)` | Summarise all symptoms into an array of summary strings | 359 |
-| `summariseBreastFeature(feature)` | Summarise a single breast feature into a concise string | 373 |
-| `summariseBreastFeatures(features)` | Summarise all breast features into an array of summary strings | 395 |
-| `summariseOtherRelevantInformation(medicalInformation)` | Summarise other relevant medical information (HRT, pregnancy/breastfeeding, other info) | 411 |
+| `isValidMedicalHistoryType(type)` | Check whether a string names a medical history type, by type or slug | 6 |
+| `getMedicalHistoryType(type)` | Get a medical history type object, by type or slug | 18 |
+| `getMedicalHistoryKeyFromSlug(slug)` | Get the camelCase data key for a medical history type from its slug | 31 |
+| `summariseMedicalHistoryItem(item)` | Summarise a single medical history item into a concise string | 42 |
+| `summariseMedicalHistory(medicalHistory)` | Summarise all medical history items into an array of summary strings | 215 |
+| `getMedicalHistoryItems(medicalHistory)` | Get all medical history items as a flat array | 244 |
+| `countMedicalHistoryItems(medicalHistory)` | Count total number of medical history items | 266 |
+| `summariseSymptom(symptom)` | Summarise a single symptom into a concise string | 288 |
+| `summariseSymptoms(symptoms)` | Summarise all symptoms into an array of summary strings | 367 |
+| `summariseBreastFeature(feature)` | Summarise a single breast feature into a concise string | 381 |
+| `summariseBreastFeatures(features)` | Summarise all breast features into an array of summary strings | 403 |
+| `getBreastDensityFactors(medicalInformation)` | Read the breast density factors off an appointment's medical information | 419 |
+| `summariseBreastDensityFactors(medicalInformation)` | Summarise breast density factors into an array of summary strings | 455 |
+| `summariseOtherMedicalInformation(medicalInformation)` | Summarise the free-text other medical information, truncating if long | 490 |
 
 ### annotation-summary.js
 
@@ -466,9 +469,9 @@ Nunjucks-specific helpers: joining arrays, resolving user names from IDs, templa
 |---|---|---|
 | `log(a, [description])` | Render a value to the browser console via an inline script tag (for template debugging) | 5 |
 | `join(input, [delimiter], [attribute], [options], [options.filterEmpty], [options.toString])` | Safely join array elements with proper undefined/null handling — e.g. `join(['a', 'b', 'c'], ', ') // 'a, b, c'` | 22 |
-| `getUsername(userId, [options], [options.identifyCurrentUser], [options.format])` | Get user name by user ID with format options | 94 |
-| `getContext()` | Return the full Nunjucks template context — useful for debugging | 136 |
-| `parseJsonString(value)` | Safely parse a JSON string and return the resulting object, or return structured data as-is | 145 |
+| `getUsername(userId, [options], [options.identifyCurrentUser], [options.useYou], [options.format])` | Get user name by user ID with format options | 94 |
+| `getContext()` | Return the full Nunjucks template context — useful for debugging | 142 |
+| `parseJsonString(value)` | Safely parse a JSON string and return the resulting object, or return structured data as-is | 151 |
 
 ### tags.js