diff --git a/app/assets/javascript/main.js b/app/assets/javascript/main.js
index bfe28e13..e59dd167 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 +188,105 @@ document.addEventListener('DOMContentLoaded', () => {
   }
 })
 
+function setupBreastDensityFactorsAutosave() {
+  const saveTarget = document.querySelector('[data-breast-density-factors-save-url]')
+  if (!saveTarget) {
+    return
+  }
+
+  const saveUrl = saveTarget.dataset.breastDensityFactorsSaveUrl
+  if (!saveUrl) {
+    return
+  }
+
+  const checkboxSelector =
+    'input[name="appointment[medicalInformation][breastDensityFactors]"]'
+  const hrtRadioSelector =
+    'input[name="appointment[medicalInformation][breastDensityFactorsHrt]"]'
+  const checkboxes = document.querySelectorAll(checkboxSelector)
+  const hrtRadios = document.querySelectorAll(hrtRadioSelector)
+
+  if (checkboxes.length === 0 && hrtRadios.length === 0) {
+    return
+  }
+
+  const updateBreastDensityFactorsSummary = () => {
+    // Find the breast-density-factors section and update its contents summary
+    const section = document.getElementById('breast-density-factors')
+    if (!section) {
+      return
+    }
+
+    // Count selected factors
+    const selectedCheckboxes = document.querySelectorAll(`${checkboxSelector}:checked`)
+    const selectedHrtRadio = document.querySelector(`${hrtRadioSelector}:checked`)
+    let count = selectedCheckboxes.length
+    if (selectedHrtRadio && selectedHrtRadio.value === 'yes') {
+      count += 1
+    }
+
+    // Find and update the contents summary span
+    const summarySpan = section.querySelector('.app-details__contents-summary')
+    if (summarySpan) {
+      if (count === 0) {
+        summarySpan.textContent = 'No breast density factors added'
+      } else if (count === 1) {
+        summarySpan.textContent = '1 breast density factor added'
+      } else {
+        summarySpan.textContent = count + ' breast density factors added'
+      }
+    }
+  }
+
+  const saveFactors = async () => {
+    const formData = new URLSearchParams()
+    const selectedCheckboxes = document.querySelectorAll(`${checkboxSelector}:checked`)
+    const selectedHrtRadio = document.querySelector(`${hrtRadioSelector}:checked`)
+
+    selectedCheckboxes.forEach((checkbox) => {
+      formData.append(
+        'appointment[medicalInformation][breastDensityFactors]',
+        checkbox.value
+      )
+    })
+
+    if (selectedHrtRadio) {
+      formData.append(
+        'appointment[medicalInformation][breastDensityFactorsHrt]',
+        selectedHrtRadio.value
+      )
+    }
+
+    try {
+      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')
+      }
+
+      // Update the summary text in the section after successful save
+      updateBreastDensityFactorsSummary()
+    } catch (error) {
+      console.error(error)
+    }
+  }
+
+  checkboxes.forEach((checkbox) => {
+    checkbox.addEventListener('change', saveFactors)
+  })
+
+  hrtRadios.forEach((radio) => {
+    radio.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/utils/medical-information.js b/app/lib/utils/medical-information.js
index 1834ab14..df79a46f 100644
--- a/app/lib/utils/medical-information.js
+++ b/app/lib/utils/medical-information.js
@@ -429,59 +429,28 @@ const summariseOtherRelevantInformation = (medicalInformation) => {
 
   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
+  const breastDensityFactorsRaw = medicalInformation.breastDensityFactors
+  const breastDensityFactors = Array.isArray(breastDensityFactorsRaw)
+    ? breastDensityFactorsRaw
+    : breastDensityFactorsRaw
+      ? [breastDensityFactorsRaw]
+      : []
+  const breastDensityFactorsHrt =
+    medicalInformation.breastDensityFactorsHrt ||
+    (breastDensityFactors.includes('hrt') ? 'yes' : undefined)
+
+  if (breastDensityFactors.includes('pregnant')) {
+    summaries.push('Pregnant')
   }
 
-  // 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')
-      }
-    }
+  if (breastDensityFactors.includes('breastfeeding')) {
+    summaries.push('Breastfeeding')
+  }
 
-    // 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 (breastDensityFactorsHrt === 'yes') {
+    summaries.push('Taking HRT')
+  } else if (breastDensityFactorsHrt === 'no') {
+    summaries.push('Not taking HRT')
   }
 
   // Other medical information (free text)
diff --git a/app/routes/appointments/medical-information.js b/app/routes/appointments/medical-information.js
index aee90aad..ab0d6ddd 100644
--- a/app/routes/appointments/medical-information.js
+++ b/app/routes/appointments/medical-information.js
@@ -7,8 +7,143 @@ const {
   getReturnUrl,
   modalBreakout
 } = require('../../lib/utils/referrers')
+const { getAppointmentData } = require('../../lib/utils/appointment-data')
 
 module.exports = (router) => {
+  // Auto-save breast density factors when checkboxes are changed
+  router.post(
+    '/clinics/:clinicId/appointments/:appointmentId/medical-information/breast-density-factors-save',
+    (req, res) => {
+      const data = req.session.data
+      const postedFactors = req.body?.appointment?.medicalInformation?.breastDensityFactors
+      const postedHrt = req.body?.appointment?.medicalInformation?.breastDensityFactorsHrt
+
+      // No posted factors means all options are currently unchecked
+      const factors = Array.isArray(postedFactors)
+        ? postedFactors
+        : postedFactors
+          ? [postedFactors]
+          : []
+      const nonHrtFactors = factors.filter((factor) => factor && factor !== 'hrt')
+
+      if (!data.appointment) {
+        data.appointment = {}
+      }
+
+      if (!data.appointment.medicalInformation) {
+        data.appointment.medicalInformation = {}
+      }
+
+      data.appointment.medicalInformation.breastDensityFactors = nonHrtFactors
+
+      if (postedHrt === 'yes' || postedHrt === 'no') {
+        data.appointment.medicalInformation.breastDensityFactorsHrt = postedHrt
+      }
+
+      // Keep a draft cache outside auto-stored form keys so later form posts
+      // cannot accidentally clear the latest autosaved checkbox state.
+      if (!data._medicalInformationDraft) {
+        data._medicalInformationDraft = {}
+      }
+      data._medicalInformationDraft.breastDensityFactors = nonHrtFactors
+
+      if (postedHrt === 'yes' || postedHrt === 'no') {
+        data._medicalInformationDraft.breastDensityFactorsHrt = postedHrt
+      }
+
+      res.status(204).send()
+    }
+  )
+
+  // Save other medical information while preserving breast density factors
+  router.post(
+    '/clinics/:clinicId/appointments/:appointmentId/medical-information/other-medical-information-save',
+    (req, res) => {
+      const { clinicId, appointmentId } = req.params
+      const data = req.session.data
+      const referrerChain = req.query.referrerChain
+      const scrollTo = req.query.scrollTo
+
+      const appointmentMedicalInformation = data?.appointment?.medicalInformation
+      const postedBreastDensityFactors =
+        appointmentMedicalInformation?.breastDensityFactors
+      const postedBreastDensityFactorsHrt =
+        appointmentMedicalInformation?.breastDensityFactorsHrt
+      const cachedBreastDensityFactors =
+        data?._medicalInformationDraft?.breastDensityFactors
+      const cachedBreastDensityFactorsHrt =
+        data?._medicalInformationDraft?.breastDensityFactorsHrt
+
+      const normalisedPostedBreastDensityFactors =
+        Array.isArray(postedBreastDensityFactors)
+          ? postedBreastDensityFactors
+          : postedBreastDensityFactors
+            ? [postedBreastDensityFactors]
+            : undefined
+
+      if (normalisedPostedBreastDensityFactors) {
+        if (!data._medicalInformationDraft) {
+          data._medicalInformationDraft = {}
+        }
+        data._medicalInformationDraft.breastDensityFactors =
+          normalisedPostedBreastDensityFactors.filter((factor) => factor && factor !== 'hrt')
+      }
+
+      if (postedBreastDensityFactorsHrt === 'yes' || postedBreastDensityFactorsHrt === 'no') {
+        if (!data._medicalInformationDraft) {
+          data._medicalInformationDraft = {}
+        }
+        data._medicalInformationDraft.breastDensityFactorsHrt =
+          postedBreastDensityFactorsHrt
+      }
+
+      // If this submission did not include factors, keep the last saved values
+      if (!normalisedPostedBreastDensityFactors)
+      {
+        const savedAppointmentData = getAppointmentData(data, clinicId, appointmentId)
+        const savedBreastDensityFactors =
+          savedAppointmentData?.appointment?.medicalInformation?.breastDensityFactors
+
+        if (cachedBreastDensityFactors)
+        {
+          data.appointment.medicalInformation.breastDensityFactors =
+            cachedBreastDensityFactors
+        }
+        else if (savedBreastDensityFactors)
+        {
+          data.appointment.medicalInformation.breastDensityFactors =
+            savedBreastDensityFactors
+        }
+      }
+
+      if (!postedBreastDensityFactorsHrt)
+      {
+        const savedAppointmentData = getAppointmentData(data, clinicId, appointmentId)
+        const savedBreastDensityFactorsHrt =
+          savedAppointmentData?.appointment?.medicalInformation?.breastDensityFactorsHrt
+
+        if (cachedBreastDensityFactorsHrt)
+        {
+          data.appointment.medicalInformation.breastDensityFactorsHrt =
+            cachedBreastDensityFactorsHrt
+        }
+        else if (savedBreastDensityFactorsHrt)
+        {
+          data.appointment.medicalInformation.breastDensityFactorsHrt =
+            savedBreastDensityFactorsHrt
+        }
+      }
+
+      const returnUrl = getReturnUrl(
+        `/clinics/${clinicId}/appointments/${appointmentId}/review-medical-information`,
+        referrerChain,
+        scrollTo
+      )
+
+      res.redirect(modalBreakout(returnUrl))
+    }
+  )
+
   // 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/medical-information/index.njk b/app/views/_includes/medical-information/index.njk
index 78da700f..0091efeb 100644
--- a/app/views/_includes/medical-information/index.njk
+++ b/app/views/_includes/medical-information/index.njk
@@ -219,60 +219,80 @@
 {% 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/summary-lists/medical-information/breast-density-factors.njk" %}
 {% endset %}
 
-{% set otherRelevantInformationCount = 0 %}
+{# Count selected breast density factors for expander summary #}
+{% set _bdf = appointment.medicalInformation.breastDensityFactors %}
+{% if _bdf and not (_bdf | isArray) %}{% set _bdf = [_bdf] %}{% endif %}
+{% set _bdfHrt = appointment.medicalInformation.breastDensityFactorsHrt %}
+{% if not _bdfHrt and _bdf and _bdf | includes("hrt") %}{% set _bdfHrt = "yes" %}{% endif %}
+{% set breastDensityCount = 0 %}
+{% if _bdfHrt == "yes" %}{% set breastDensityCount = breastDensityCount + 1 %}{% endif %}
+{% if _bdf and _bdf | includes("pregnant") %}{% set breastDensityCount = breastDensityCount + 1 %}{% endif %}
+{% if _bdf and _bdf | includes("breastfeeding") %}{% set breastDensityCount = breastDensityCount + 1 %}{% endif %}
+{% 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..d4bbab01 100644
--- a/app/views/_includes/summary-lists/medical-info-summary.njk
+++ b/app/views/_includes/summary-lists/medical-info-summary.njk
@@ -127,23 +127,37 @@
 {# 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 _bdf = appointment.medicalInformation.breastDensityFactors %}
+{% if _bdf and not (_bdf | isArray) %}{% set _bdf = [_bdf] %}{% endif %}
+{% set _bdfHrt = appointment.medicalInformation.breastDensityFactorsHrt %}
+{% if not _bdfHrt and _bdf and _bdf | includes("hrt") %}{% set _bdfHrt = "yes" %}{% endif %}
 
-{# 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 _bdfHrt == "yes" or _bdfHrt == "no" or (_bdf and _bdf | length > 0) %}
     <ul class="nhsuk-list">
-      {% for summary in otherRelevantInfoSummaries %}
-        <li>{{ summary }}</li>
-      {% endfor %}
+      {% if _bdfHrt == "yes" %}<li>Taking HRT</li>{% endif %}
+      {% if _bdfHrt == "no" %}<li>Not taking HRT</li>{% endif %}
+      {% if _bdf and _bdf | includes("pregnant") %}<li>Pregnant</li>{% endif %}
+      {% if _bdf and _bdf | includes("breastfeeding") %}<li>Breastfeeding</li>{% endif %}
     </ul>
+  {% else %}
+    <p>No breast density factors added</p>
+  {% endif %}
+{% endset %}
+
+{% set breastDensityCount = 0 %}
+{% if _bdfHrt == "yes" %}{% set breastDensityCount = breastDensityCount + 1 %}{% endif %}
+{% if _bdf and _bdf | includes("pregnant") %}{% set breastDensityCount = breastDensityCount + 1 %}{% endif %}
+{% if _bdf and _bdf | includes("breastfeeding") %}{% set breastDensityCount = breastDensityCount + 1 %}{% endif %}
+
+{# Other medical information summary #}
+{% set otherMedicalInfo = appointment.medicalInformation.otherMedicalInformation %}
+{% set otherMedicalInfoHtml %}
+  {% if otherMedicalInfo %}
+    <p>{{ otherMedicalInfo }}</p>
+  {% else %}
+    <p>No other medical information added</p>
   {% endif %}
 {% endset %}
 
@@ -266,20 +280,40 @@
   }) %}
 {% 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/breast-density-factors.njk b/app/views/_includes/summary-lists/medical-information/breast-density-factors.njk
new file mode 100644
index 00000000..eb5c2a2d
--- /dev/null
+++ b/app/views/_includes/summary-lists/medical-information/breast-density-factors.njk
@@ -0,0 +1,112 @@
+{# app/views/_includes/summary-lists/medical-information/breast-density-factors.njk #}
+
+{% set selectedBreastDensityFactors = appointment.medicalInformation.breastDensityFactors %}
+{% set breastDensityFactorsHrt = appointment.medicalInformation.breastDensityFactorsHrt %}
+
+{% if selectedBreastDensityFactors and not (selectedBreastDensityFactors | isArray) %}
+  {% set selectedBreastDensityFactors = [selectedBreastDensityFactors] %}
+{% endif %}
+
+{% if not breastDensityFactorsHrt and selectedBreastDensityFactors and selectedBreastDensityFactors | includes("hrt") %}
+  {% set breastDensityFactorsHrt = "yes" %}
+{% endif %}
+
+{% set participantName = participant | getFullName %}
+
+{% set breastDensityFactorsHrtQuestion = "Has " + participantName + " begun course of HRT since their last screening appointment?" %}
+{% set pregnantOrBreastfeedingQuestion = "Is " + participantName + " pregnant or breastfeeding?" %}
+
+{% set breastDensityFactorsHrtSummaryHtml %}
+  {{ "Yes" if breastDensityFactorsHrt == "yes" or (selectedBreastDensityFactors and selectedBreastDensityFactors | includes("hrt")) else "No" }}
+{% endset %}
+
+{% set pregnantOrBreastfeedingSummaryHtml %}
+  {% if selectedBreastDensityFactors and (selectedBreastDensityFactors | includes("pregnant") or selectedBreastDensityFactors | includes("breastfeeding")) %}
+    <ul class="nhsuk-list">
+      {% if selectedBreastDensityFactors | includes("pregnant") %}
+        <li>Pregnant</li>
+      {% endif %}
+      {% if selectedBreastDensityFactors | includes("breastfeeding") %}
+        <li>Breastfeeding</li>
+      {% endif %}
+    </ul>
+  {% else %}
+    <p>No</p>
+  {% endif %}
+{% endset %}
+
+<div
+  class="nhsuk-u-visually-hidden"
+  data-breast-density-factors-save-url="{{ contextUrl }}/medical-information/breast-density-factors-save"
+></div>
+
+<p class="nhsuk-hint">Select any current or recent considerations</p>
+
+{% set breastDensityFactorsHrtInputHtml %}
+  {{ radios({
+    name: "appointment[medicalInformation][breastDensityFactorsHrt]",
+    value: breastDensityFactorsHrt,
+    classes: "nhsuk-radios--inline nhsuk-radios--small",
+    fieldset: {
+      legend: {
+        text: breastDensityFactorsHrtQuestion,
+        classes: "nhsuk-fieldset__legend--s"
+      }
+    },
+    items: [
+      {
+        value: "yes",
+        text: "Yes"
+      },
+      {
+        value: "no",
+        text: "No"
+      }
+    ]
+  }) }}
+{% endset %}
+
+{% set pregnantOrBreastfeedingInputHtml %}
+  {{ checkboxes({
+    name: "appointment[medicalInformation][breastDensityFactors]",
+    values: selectedBreastDensityFactors,
+    classes: "nhsuk-checkboxes--small",
+    fieldset: {
+      legend: {
+        text: pregnantOrBreastfeedingQuestion,
+        classes: "nhsuk-fieldset__legend--s"
+      }
+    },
+    items: [
+      {
+        value: "pregnant",
+        text: "Pregnant"
+      },
+      {
+        value: "breastfeeding",
+        text: "Breastfeeding"
+      }
+    ]
+  }) }}
+{% endset %}
+
+{{ summaryList({
+  rows: [
+    {
+      key: {
+        text: "HRT (Hormone replacement therapy)"
+      },
+      value: {
+        html: breastDensityFactorsHrtInputHtml if allowEdits else breastDensityFactorsHrtSummaryHtml
+      }
+    },
+    {
+      key: {
+        text: "Pregnant or breastfeeding"
+      },
+      value: {
+        html: pregnantOrBreastfeedingInputHtml if allowEdits else pregnantOrBreastfeedingSummaryHtml
+      }
+    }
+  ]
+} | openInModal | handleSummaryListMissingInformation | removeLastRowBorder ) }}
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..8a061f52 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/summary-lists/medical-information/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..18cae417
--- /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/summary-lists/medical-information/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/other-medical-information.html b/app/views/appointments/medical-information/other-medical-information.html
index a83beb76..de2d8873 100644
--- a/app/views/appointments/medical-information/other-medical-information.html
+++ b/app/views/appointments/medical-information/other-medical-information.html
@@ -6,10 +6,21 @@
 
 {% set gridColumn = "nhsuk-grid-column-two-thirds" %}
 
-{% set formAction = './../review-medical-information' | getReturnUrl(referrerChain, query.scrollTo) %}
+{% set formAction = './other-medical-information-save' | urlWithReferrer(referrerChain, query.scrollTo) %}
 
 {% block pageContent %}
 
+  {% set selectedBreastDensityFactors = appointment.medicalInformation.breastDensityFactors %}
+  {% set breastDensityFactorsHrt = appointment.medicalInformation.breastDensityFactorsHrt %}
+
+  {% if selectedBreastDensityFactors and not (selectedBreastDensityFactors | isArray) %}
+    {% set selectedBreastDensityFactors = [selectedBreastDensityFactors] %}
+  {% endif %}
+
+  {% if not breastDensityFactorsHrt and selectedBreastDensityFactors and selectedBreastDensityFactors | includes("hrt") %}
+    {% set breastDensityFactorsHrt = "yes" %}
+  {% endif %}
+
   <h1 class="nhsuk-heading-l">
     <span class="nhsuk-caption-l">
       {{ participant | getFullName }}
@@ -26,6 +37,24 @@ <h1 class="nhsuk-heading-l">
     rows: 10
   }) }}
 
+  {% if selectedBreastDensityFactors %}
+    {% for factor in selectedBreastDensityFactors %}
+      {% if factor != "hrt" %}
+        {{ appHiddenInput({
+          name: "appointment[medicalInformation][breastDensityFactors]",
+          value: factor
+        }) }}
+      {% endif %}
+    {% endfor %}
+  {% endif %}
+
+  {% if breastDensityFactorsHrt %}
+    {{ appHiddenInput({
+      name: "appointment[medicalInformation][breastDensityFactorsHrt]",
+      value: breastDensityFactorsHrt
+    }) }}
+  {% endif %}
+
   {{ button({
     text: "Save"
   }) }}