{"id":599,"date":"2026-10-14T07:59:35","date_gmt":"2026-10-14T07:59:35","guid":{"rendered":"https:\/\/ivfprep.guide\/articles\/?p=599"},"modified":"2026-10-14T08:04:23","modified_gmt":"2026-10-14T08:04:23","slug":"implantation-rash","status":"publish","type":"post","link":"https:\/\/ivfprep.guide\/articles\/implantation-rash\/","title":{"rendered":"Implantation Rash: Why It Is Not a Sign, and What Causes One"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>There is no evidence that an implantation rash exists. No study links a rash to an embryo implanting, and the NHS list of early pregnancy signs does not mention skin at all. 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String(window.getSelection()) : '';\n      if (sel && sel.trim()) { return; }\n      var el = e.target.closest('[data-i]'); if (!el) { return; }\n      var i = parseInt(el.getAttribute('data-i'), 10); if (isNaN(i)) { return; }\n      if (!audio.paused && i === curIdx) { return; }\n      lastUser = Date.now();\n      audio.currentTime = starts[i];\n      var p = audio.play(); if (p && p.catch) { p.catch(function(){}); }\n      try { if (typeof gtag === 'function') { gtag('event', 'audio_chapter', { article: location.pathname, source: 'sentence', start: Math.round(starts[i]) }); } } catch (err) {}\n    });\n    audio.addEventListener('seeked', tick);\n    audio.addEventListener('ended', function(){ setNow(-1); });\n  }\n  if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', start); } else { start(); }\n})();<\/script>\n<\/div>\n\n\n\n<p class=\"msq-hook wp-block-paragraph\">On this page: a table of what five UK and US medicine documents say about skin reactions, with each frequency in the document&#8217;s own words, four r\/IVF threads read on 14 October 2026, and the plain line between a rash for the clinic and one for 999.<\/p>\n\n\n\n<div class=\"msq\" id=\"ms-quiz\" data-slug=\"implantation-rash\" data-category=\"signs and symptoms\" data-list=\"1\">\n<style>.msq,.msq-hook,.msq-box,.msq-end,.msq-tool{--msq-accent:#1F4E79;--msq-accent-text:#FFFFFF;--msq-line:#CBD8E6;--msq-warn:#B4531A;--msq-muted:#4A5560;--msq-tint:#EEF3F8;--msq-base:#FFFFFF}\n.msq{margin:1.25em 0 1.75em}\n.msq-hook{border-left:3px solid var(--msq-accent);padding:6px 14px;color:var(--msq-muted);font-size:.97em}\n.msq-box{background:var(--msq-tint);border:1px solid var(--msq-line);border-radius:12px;padding:0}\n.msq-box>summary{cursor:pointer;list-style:none;padding:14px 18px;font-weight:700;color:var(--msq-accent)}\n.msq-box>summary::-webkit-details-marker{display:none}\n.msq-box>summary::before{content:\"+\";display:inline-block;width:1.1em;font-weight:800}\n.msq-box[open]>summary::before{content:\"\\00d7\"}\n.msq-body{padding:2px 18px 18px}\n.msq-intro{margin:0 0 12px;font-size:.95em;color:var(--msq-muted)}\n.msq-list{margin:0;padding:0;list-style:none}\n.msq-q{margin:0 0 18px;padding:0}\n.msq-question{font-weight:700;margin:0 0 8px}\n.msq-options{display:flex;flex-direction:column;gap:8px}\n.msq-opt{text-align:left;background:var(--msq-base);border:1px solid var(--msq-line);border-radius:8px;padding:10px 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solid var(--msq-muted);border-radius:8px;font:inherit;background:#fff}\n.msq-btn{background:var(--msq-accent);color:var(--msq-accent-text);border:0;border-radius:8px;padding:11px 18px;font:inherit;font-weight:700;cursor:pointer}\n.msq-btn:hover{filter:brightness(.92)}\n.msq-btn[disabled]{opacity:.7;cursor:default}\n.msq-no{font-size:.9em;color:var(--msq-muted);margin-left:4px}\n.msq-privacy{margin:6px 0 0;font-size:.82em;color:var(--msq-muted);flex-basis:100%}\n.msq-hp{position:absolute;left:-5000px;width:1px;height:1px;overflow:hidden}\n.msq-msg{margin:8px 0 0;font-size:.92em}\n.msq-end{margin:1.5em 0;padding:18px;border:1px solid var(--msq-accent);border-radius:12px;text-align:center;background:var(--msq-tint)}\n.msq-end p{margin:0 0 12px}\n.msq-end .msq-body{text-align:left;padding:16px 0 0}\n.msq-end .msq-start-test[hidden]{display:none}\n.msq-tool{margin:1.5em 0;padding:18px 20px;background:var(--msq-tint);border:1px solid var(--msq-line);border-radius:12px}\n.msq-tool h3{margin:0 0 6px;font-size:1.15em}\n.msq-tool p{margin:0 0 10px}\n.msq-tool .msq-note{font-size:.85em;color:var(--msq-muted);margin:10px 0 0}\n.msq-check label{display:flex;gap:10px;align-items:flex-start;padding:9px 0;border-bottom:1px solid var(--msq-line);cursor:pointer;line-height:1.4}\n.msq-check label:last-of-type{border-bottom:0}\n.msq-check input{margin-top:5px;flex:0 0 auto;width:18px;height:18px;accent-color:var(--msq-accent)}\n.msq-check-count{font-weight:700;margin:10px 0 0}\n.msq-verdict-box{margin:12px 0 0;padding:10px 14px;border-radius:8px;background:var(--msq-base);border-left:3px solid var(--msq-warn)}\n.msq-verdict-box[hidden]{display:none}\n.msq-calc{display:grid;grid-template-columns:1fr 1fr;gap:10px 16px}\n.msq-calc label{display:flex;flex-direction:column;gap:4px;font-size:.92em}\n.msq-calc input,.msq-calc select{padding:8px 10px;border:1px solid var(--msq-muted);border-radius:8px;font:inherit;background:#fff}\n.msq-calc-out{grid-column:1 \/ -1;margin-top:6px;padding:12px 14px;background:var(--msq-base);border-radius:8px;border:1px solid var(--msq-line)}\n.msq-calc-out strong{font-size:1.15em}\n.msq-choose label{display:block;padding:9px 12px;margin:0 0 8px;background:var(--msq-base);border:1px solid var(--msq-line);border-radius:8px;cursor:pointer}\n.msq-choose input{margin-right:8px;accent-color:var(--msq-accent)}\n.msq-choice-result{margin-top:10px;padding:12px 14px;background:var(--msq-base);border-left:3px solid var(--msq-accent);border-radius:0 8px 8px 0}\n.msq-choice-result[hidden]{display:none}\n@media (max-width:600px){.msq-calc{grid-template-columns:1fr}}\nh2.wp-block-heading[id]{scroll-margin-top:24px}<\/style>\n<noscript><style>.msq-explain{display:block !important}<\/style><\/noscript>\n<details class=\"msq-box\">\n<summary>Think you already know this? Five questions, one minute.<\/summary>\n<div class=\"msq-body\">\n<p class=\"msq-intro\">Every answer is on this page. Answer from what you know now; the page fills in the rest.<\/p>\n<ol class=\"msq-list\">\n<li class=\"msq-q\" data-q=\"1\" data-answer=\"a\" data-title=\"Is an implantation rash a real thing?\" data-section=\"#is-an-implantation-rash-a-real-thing\">\n<p class=\"msq-question\">1. How many of the early pregnancy signs on the NHS list involve the skin?<\/p>\n<div class=\"msq-options\" role=\"group\" aria-label=\"Question 1 options\"><button type=\"button\" class=\"msq-opt\" data-opt=\"a\">None of the twelve<\/button><button type=\"button\" class=\"msq-opt\" data-opt=\"b\">Two of the twelve<\/button><button type=\"button\" class=\"msq-opt\" data-opt=\"c\">Half of them<\/button><\/div>\n<p class=\"msq-explain\" hidden><span class=\"msq-verdict\"><\/span>The <a href=\"https:\/\/www.nhs.uk\/pregnancy\/trying-for-a-baby\/signs-and-symptoms-of-pregnancy\/\" target=\"_blank\" rel=\"noopener\">NHS signs and symptoms of pregnancy page<\/a>, last reviewed on 31 July 2026, lists twelve early signs and none is a rash, itching or a skin change. <a class=\"msq-section\" href=\"#is-an-implantation-rash-a-real-thing\">Read the section<\/a><\/p>\n<\/li>\n<li class=\"msq-q\" data-q=\"2\" data-answer=\"c\" data-title=\"What do the medicine leaflets say about skin reactions?\" data-section=\"#what-do-the-medicine-leaflets-say-about-skin-reactions\">\n<p class=\"msq-question\">2. How does the Evorel estradiol patch leaflet class irritated, itchy skin and rash where the patch is applied?<\/p>\n<div class=\"msq-options\" role=\"group\" aria-label=\"Question 2 options\"><button type=\"button\" class=\"msq-opt\" data-opt=\"a\">Rare<\/button><button type=\"button\" class=\"msq-opt\" data-opt=\"b\">Uncommon, up to 1 in 100<\/button><button type=\"button\" class=\"msq-opt\" data-opt=\"c\">Very common, more than 1 in 10<\/button><\/div>\n<p class=\"msq-explain\" hidden><span class=\"msq-verdict\"><\/span>The <a href=\"https:\/\/www.medicines.org.uk\/emc\/product\/10927\/pil\" target=\"_blank\" rel=\"noopener\">Evorel patient leaflet<\/a> puts it in the very common band; the <a href=\"https:\/\/www.medicines.org.uk\/emc\/product\/10927\/smpc\" target=\"_blank\" rel=\"noopener\">product information<\/a> reports application site rash in 20.8 percent of trial patients. <a class=\"msq-section\" href=\"#what-do-the-medicine-leaflets-say-about-skin-reactions\">Read the section<\/a><\/p>\n<\/li>\n<li class=\"msq-q\" data-q=\"3\" data-answer=\"a\" data-title=\"What else can cause a rash in the two week wait?\" data-section=\"#what-else-can-cause-a-rash-in-the-two-week-wait\">\n<p class=\"msq-question\">3. According to DermNet, how common is autoimmune progesterone dermatitis?<\/p>\n<div class=\"msq-options\" role=\"group\" aria-label=\"Question 3 options\"><button type=\"button\" class=\"msq-opt\" data-opt=\"a\">Rare<\/button><button type=\"button\" class=\"msq-opt\" data-opt=\"b\">Seen in most IVF cycles<\/button><button type=\"button\" class=\"msq-opt\" data-opt=\"c\">The usual cause of rashes after transfer<\/button><\/div>\n<p class=\"msq-explain\" hidden><span class=\"msq-verdict\"><\/span><a href=\"https:\/\/dermnetnz.org\/topics\/autoimmune-progesterone-dermatitis\" target=\"_blank\" rel=\"noopener\">DermNet<\/a> describes it as a rare reaction to progesterone, often in people who have had progestogens before, including in fertility treatment. <a class=\"msq-section\" href=\"#what-else-can-cause-a-rash-in-the-two-week-wait\">Read the section<\/a><\/p>\n<\/li>\n<li class=\"msq-q\" data-q=\"4\" data-answer=\"b\" data-title=\"What do people on IVF forums report about rashes?\" data-section=\"#what-do-people-on-ivf-forums-report-about-rashes\">\n<p class=\"msq-question\">4. In the threads this page read, what did people blame their rashes on?<\/p>\n<div class=\"msq-options\" role=\"group\" aria-label=\"Question 4 options\"><button type=\"button\" class=\"msq-opt\" data-opt=\"a\">Implantation<\/button><button type=\"button\" class=\"msq-opt\" data-opt=\"b\">A medicine or an injection<\/button><button type=\"button\" class=\"msq-opt\" data-opt=\"c\">Nothing in particular<\/button><\/div>\n<p class=\"msq-explain\" hidden><span class=\"msq-verdict\"><\/span>Every account in the four r\/IVF threads, such as <a href=\"https:\/\/www.reddit.com\/r\/IVF\/comments\/1o9j1wc\/progesterone_in_oil_rash\/\" target=\"_blank\" rel=\"noopener\">this October 2025 thread<\/a>, blamed a medicine or an injection. These are reports, not findings. <a class=\"msq-section\" href=\"#what-do-people-on-ivf-forums-report-about-rashes\">Read the section<\/a><\/p>\n<\/li>\n<li class=\"msq-q\" data-q=\"5\" data-answer=\"a\" data-title=\"Why does a rash, or no rash, tell you nothing about the result?\" data-section=\"#why-does-a-rash-or-no-rash-tell-you-nothing-about-the-result\">\n<p class=\"msq-question\">5. Why can a rash from a transfer medicine not tell one outcome from another?<\/p>\n<div class=\"msq-options\" role=\"group\" aria-label=\"Question 5 options\"><button type=\"button\" class=\"msq-opt\" data-opt=\"a\">Because the medicine is given whether or not an embryo implants<\/button><button type=\"button\" class=\"msq-opt\" data-opt=\"b\">Because rashes only appear after a positive test<\/button><button type=\"button\" class=\"msq-opt\" data-opt=\"c\">Because rashes only appear after a negative test<\/button><\/div>\n<p class=\"msq-explain\" hidden><span class=\"msq-verdict\"><\/span>Leaflets such as the <a href=\"https:\/\/www.medicines.org.uk\/emc\/product\/102647\/pil\" target=\"_blank\" rel=\"noopener\">Lubion leaflet<\/a> list skin reactions from the medicine itself, which is used in every cycle, so the reaction turns up whatever the outcome. <a class=\"msq-section\" href=\"#why-does-a-rash-or-no-rash-tell-you-nothing-about-the-result\">Read the section<\/a><\/p>\n<\/li>\n<\/ol>\n<div class=\"msq-result\" hidden><\/div>\n<\/div>\n<\/details>\n<script>(function(){\n  if (window.__msqInit) { return; }\n  window.__msqInit = true;\n  var root = document.getElementById('ms-quiz');\n  if (!root) { return; }\n  var meta = { slug: root.getAttribute('data-slug'), category: root.getAttribute('data-category'),\n               list: root.getAttribute('data-list') || '1' };\n  function qs(el, s){ return el.querySelector(s); }\n  function qsa(el, s){ return Array.prototype.slice.call(el.querySelectorAll(s)); }\n  function track(name, params){\n    try { if (typeof gtag === 'function') { var p = params || {}; p.article = meta.slug; gtag('event', name, p); } } catch (e) {}\n  }\n  function jumpList(missed){\n    if (!missed.length) { return ''; }\n    return '<ul class=\"msq-jump\">' + missed.map(function(q){\n      return '<li><a href=\"' + q.getAttribute('data-section') + '\">' + q.getAttribute('data-title') + '<\/a><\/li>';\n    }).join('') + '<\/ul>';\n  }\n  function emailForm(){\n    return '<div class=\"msq-sub\"><p><strong>Get the next one.<\/strong> We publish new articles on ' + meta.category\n      + ' most weeks and recheck this page on Sundays. 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The Sunday refresh keeps this page current either way.<\/p>';\n      track('quiz_email', { result: 'declined' });\n    });\n    form.addEventListener('submit', function(e){\n      e.preventDefault();\n      var input = qs(form, 'input[name=email]'), btn = qs(form, '.msq-btn');\n      var email = input.value.trim(); input.value = email;\n      if (!\/^[^\\s@]+@[^\\s@]+\\.[^\\s@]+$\/.test(email)) { msg.textContent = 'That email does not look right.'; return; }\n      btn.disabled = true; btn.textContent = 'Sending';\n      function reset(){ btn.disabled = false; btn.textContent = 'Email me the updates'; }\n      sendForm(form).then(function(r){\n        if (r.status === 'ok' || r.status === 'unknown') {\n          sub.innerHTML = '<p class=\"msq-msg\"><strong>Done.<\/strong> We will email you when the next article on ' + meta.category\n            + ' goes up and when this page changes. If a confirmation email arrives, click it.<\/p>';\n          track('quiz_email', { result: r.status });\n          if (r.status === 'ok') { track('generate_lead', { method: 'quiz' }); }\n        } else if (r.status === 'notlive') {\n          msg.textContent = 'Sign up is not switched on yet for this site. Nothing was stored.'; reset();\n          track('quiz_email', { result: 'notlive' });\n        } else {\n          msg.textContent = r.message || 'Please check the email address and try again.'; reset();\n          track('quiz_email', { result: 'rejected' });\n        }\n      }).catch(function(){\n        msg.textContent = 'Could not reach the sign up service just now. 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Jump straight to what you missed:<\/p>' + jumpList(missed);\n      try { sessionStorage.setItem('msq-pre-' + meta.slug, String(score)); } catch (e) {}\n    } else {\n      var pre = null;\n      try { pre = sessionStorage.getItem('msq-pre-' + meta.slug); } catch (e) {}\n      h = '<h3>You got ' + score + ' of ' + total + '.<\/h3>';\n      if (pre !== null) { h += '<p>Before reading you had ' + pre + ' of ' + total + '.<\/p>'; }\n      if (missed.length) { h += '<p>Worth a second look:<\/p>' + jumpList(missed); }\n      h += emailForm();\n    }\n    result.innerHTML = h; result.hidden = false;\n    if (mode !== 'pre') { wireForm(qs(result, '.msq-sub')); }\n    result.scrollIntoView({ behavior: 'smooth', block: 'nearest' });\n  }\n  function setup(container, mode){\n    var qEls = qsa(container, '.msq-q'), answered = 0, score = 0, missed = [];\n    qEls.forEach(function(q){\n      var answer = q.getAttribute('data-answer'), opts = qsa(q, '.msq-opt'), explain = qs(q, '.msq-explain');\n      q.removeAttribute('data-done'); explain.hidden = true; qs(explain, '.msq-verdict').textContent = '';\n      opts.forEach(function(b){ b.disabled = false; b.classList.remove('is-right', 'is-wrong'); });\n      opts.forEach(function(b){\n        b.addEventListener('click', function(){\n          if (q.getAttribute('data-done')) { return; }\n          q.setAttribute('data-done', '1');\n          var ok = b.getAttribute('data-opt') === answer;\n          opts.forEach(function(o){ o.disabled = true; if (o.getAttribute('data-opt') === answer) { o.classList.add('is-right'); } });\n          if (ok) { score += 1; } else { b.classList.add('is-wrong'); missed.push(q); }\n          qs(explain, '.msq-verdict').textContent = ok ? 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A delegated listener finds it at click time. *\/\n  document.addEventListener('click', function(e){\n    var startBtn = (e.target && e.target.closest) ? e.target.closest('.msq-start-test') : null;\n    if (!startBtn) { return; }\n    var end = startBtn.closest('.msq-end');\n    if (!end) { return; }\n    var mount = qs(end, '.msq-mount');\n    var clone = qs(root, '.msq-body').cloneNode(true);\n    var intro = qs(clone, '.msq-intro');\n    if (intro) { intro.textContent = 'The same five questions, now that you have read the page.'; }\n    var res = qs(clone, '.msq-result'); if (res) { res.hidden = true; res.innerHTML = ''; }\n    mount.innerHTML = ''; mount.appendChild(clone);\n    setup(mount, 'test');\n    startBtn.hidden = true;\n    track('quiz_open', { mode: 'test' });\n    mount.scrollIntoView({ behavior: 'smooth', block: 'start' });\n    var first = qs(mount, '.msq-opt'); if (first) { first.focus({ preventScroll: true }); }\n  });\n  \/* Shared tool behaviour: checklists remember their ticks on this device, and a chooser\n     shows the result for the option picked. Calculators carry their own small script. *\/\n  function initTools(){\n    qsa(document, '.msq-check').forEach(function(box){\n      var key = 'msq-check-' + meta.slug + '-' + (box.getAttribute('data-id') || 'x');\n      var boxes = qsa(box, 'input[type=checkbox]'), count = qs(box, '.msq-check-count');\n      var yes = qs(box, '.msq-verdict-yes'), no = qs(box, '.msq-verdict-no');\n      var saved = {};\n      try { saved = JSON.parse(localStorage.getItem(key) || '{}'); } catch (e) {}\n      boxes.forEach(function(cb, i){ if (saved[i]) { cb.checked = true; } });\n      function refresh(){\n        var n = boxes.filter(function(cb){ return cb.checked; }).length, state = {};\n        boxes.forEach(function(cb, i){ if (cb.checked) { state[i] = 1; } });\n        try { localStorage.setItem(key, JSON.stringify(state)); } catch (e) {}\n        if (count) { count.textContent = n + ' of ' + boxes.length + (box.getAttribute('data-verb') || ' done'); }\n        if (yes && no) { yes.hidden = n === 0; no.hidden = n !== 0; }\n      }\n      boxes.forEach(function(cb){ cb.addEventListener('change', function(){ refresh(); track('tool_check', { tool: box.getAttribute('data-id') }); }); });\n      refresh();\n    });\n    qsa(document, '.msq-choose').forEach(function(box){\n      var results = qsa(box, '.msq-choice-result');\n      qsa(box, 'input[type=radio]').forEach(function(r){\n        r.addEventListener('change', function(){\n          results.forEach(function(el){ el.hidden = el.getAttribute('data-for') !== r.value; });\n          track('tool_choose', { tool: box.getAttribute('data-id'), choice: r.value });\n        });\n      });\n    });\n  }\n  \/\/ read progress: how far down the article the reader has scrolled, fired once per quarter\n  (function(){\n    var art = root.closest('article') || root.parentNode, fired = {};\n    function check(){\n      var top = art.getBoundingClientRect().top + window.pageYOffset, h = art.offsetHeight || 1;\n      var seen = (window.pageYOffset + window.innerHeight - top) \/ h * 100;\n      [25, 50, 75, 100].forEach(function(m){ if (seen >= m && !fired[m]) { fired[m] = true; track('read_progress', { percent: m }); } });\n    }\n    window.addEventListener('scroll', check, { passive: true }); window.addEventListener('load', check);\n  })();\n  if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', initTools); } else { initTools(); }\n})();<\/script>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Checked on 14 October 2026 against the UK patient leaflets and product information for the medicines below. This page describes what those documents say about groups of people. It cannot tell anyone what their own rash is, and it says nothing about whether a transfer has worked. Your clinic knows your protocol, your medicines and your history; this page does not.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"is-an-implantation-rash-a-real-thing\">Is an implantation rash a real thing?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Search for the phrase and the results are a tour of the internet&#8217;s odd corners: a study of skin reactions over metal implants, a forum about contraceptive implants, a few image sites, and a thread where someone asked whether her rash was implantation and nobody could answer. That last one is the honest summary. Nobody can, because there is nothing to answer with.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Implantation is an embryo of a few hundred cells settling into the lining of the womb. It does not reach the skin, and no hormone it starts producing in the first days is known to cause a rash. The <a href=\"https:\/\/www.nhs.uk\/pregnancy\/trying-for-a-baby\/signs-and-symptoms-of-pregnancy\/\" target=\"_blank\" rel=\"noopener\">NHS page on signs and symptoms of pregnancy<\/a>, last reviewed on 31 July 2026, lists twelve early signs, from a missed period to a metallic taste, and not one of them is a rash, itching or any change in the skin. We looked for a clinical source using the term implantation rash and found none.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So the phrase is a symptom list&#8217;s invention, not a medical one. The rash itself, though, is often very real, and it usually has a duller explanation sitting in the fridge or the bathroom cabinet. The same is true of most of the feelings people examine in this fortnight, which our page on <a href=\"https:\/\/ivfprep.guide\/articles\/signs-of-implantation\/\">the honest answer about signs of implantation after transfer<\/a> goes through one by one.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-do-the-medicine-leaflets-say-about-skin-reactions\">What do the medicine leaflets say about skin reactions?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The medicines used to support a transfer are the likeliest source of a rash in the two week wait, and their leaflets are unusually frank about it. The table gathers what the UK leaflets and product information say about skin, with the frequency in each document&#8217;s own words. Which of these, if any, a person is using is set by their clinic, and nothing here is a suggestion to change anything.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Medicine type<\/th><th>What the document lists for skin<\/th><th>How often, per the document<\/th><th>Source<\/th><\/tr><\/thead><tbody><tr><td>Estradiol patch (Evorel)<\/td><td>Irritated, itchy skin and rash where the patch is applied<\/td><td>Very common, more than 1 in 10. In trials: application site rash 20.8%, itching 19.8%, redness 8.5%<\/td><td><a href=\"https:\/\/www.medicines.org.uk\/emc\/product\/10927\/pil\" target=\"_blank\" rel=\"noopener\">Evorel leaflet<\/a>, <a href=\"https:\/\/www.medicines.org.uk\/emc\/product\/10927\/smpc\" target=\"_blank\" rel=\"noopener\">SmPC<\/a><\/td><\/tr><tr><td>Progesterone injection under the skin (Lubion)<\/td><td>Pain, redness, itching, irritation or swelling at the injection site<\/td><td>Very common, more than 1 in 10<\/td><td><a href=\"https:\/\/www.medicines.org.uk\/emc\/product\/102647\/pil\" target=\"_blank\" rel=\"noopener\">Lubion leaflet<\/a>, <a href=\"https:\/\/www.medicines.org.uk\/emc\/product\/102647\/smpc\" target=\"_blank\" rel=\"noopener\">SmPC<\/a><\/td><\/tr><tr><td>Progesterone in oil, into the muscle (US label)<\/td><td>Pain, irritation and redness at the injection site; hives, itching, generalised rash<\/td><td>No frequency given; the label calls the drug irritating at the injection site<\/td><td><a href=\"https:\/\/dailymed.nlm.nih.gov\/dailymed\/fda\/fdaDrugXsl.cfm?setid=83cfc12e-75d1-4284-bcc3-beadcbd27171\" target=\"_blank\" rel=\"noopener\">DailyMed label<\/a><\/td><\/tr><tr><td>Progesterone pessary (Cyclogest), in fertility treatment<\/td><td>Night sweats, skin rash or itching; itching at the application site<\/td><td>Uncommon, up to 1 in 100<\/td><td><a href=\"https:\/\/www.medicines.org.uk\/emc\/files\/pil.5569.pdf\" target=\"_blank\" rel=\"noopener\">Cyclogest leaflet<\/a>, <a href=\"https:\/\/www.medicines.org.uk\/emc\/product\/5569\/smpc\" target=\"_blank\" rel=\"noopener\">SmPC<\/a><\/td><\/tr><tr><td>Progesterone vaginal gel (Crinone)<\/td><td>Itching or burning; skin rash as an allergic reaction; contact dermatitis from sorbic acid<\/td><td>Itching or burning common in the SmPC; rash frequency not known<\/td><td><a href=\"https:\/\/www.medicines.org.uk\/emc\/product\/1283\/smpc\" target=\"_blank\" rel=\"noopener\">Crinone SmPC<\/a>, <a href=\"https:\/\/www.medicines.org.uk\/emc\/files\/pil.1283.pdf\" target=\"_blank\" rel=\"noopener\">leaflet<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Two things stand out. The skin reactions that are very common are the ones at the spot where something touches or enters the skin: the patch, the injection. A rash that sits exactly under yesterday&#8217;s patch has a fairly obvious suspect. And the documents disagree with each other in places. Crinone&#8217;s product information puts itching or burning in its common band, while its patient leaflet lists an itchy rash only as an allergic reaction of unknown frequency. We have given both rather than pick the tidier one.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The leaflets also agree on one thing that matters more than any frequency. The <a href=\"https:\/\/www.medicines.org.uk\/emc\/files\/pil.5569.pdf\" target=\"_blank\" rel=\"noopener\">Cyclogest leaflet<\/a>, revised in October 2022, says that a skin rash, which may be itchy, can be a sign of an allergic reaction and that the doctor should be contacted at once. The <a href=\"https:\/\/dailymed.nlm.nih.gov\/dailymed\/fda\/fdaDrugXsl.cfm?setid=83cfc12e-75d1-4284-bcc3-beadcbd27171\" target=\"_blank\" rel=\"noopener\">US label for progesterone in oil<\/a> lists sesame oil allergy as a reason not to use it, because sesame oil is what the progesterone is dissolved in.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1376\" height=\"768\" src=\"https:\/\/ivfprep.guide\/articles\/wp-content\/uploads\/2026\/10\/checking-medicine-leaflet-for-implantation-rash.jpg\" alt=\"Hands unfolding a medicine leaflet to read the skin side effects behind a so called implantation rash\" class=\"wp-image-597\" srcset=\"https:\/\/ivfprep.guide\/articles\/wp-content\/uploads\/2026\/10\/checking-medicine-leaflet-for-implantation-rash.jpg 1376w, https:\/\/ivfprep.guide\/articles\/wp-content\/uploads\/2026\/10\/checking-medicine-leaflet-for-implantation-rash-300x167.jpg 300w, https:\/\/ivfprep.guide\/articles\/wp-content\/uploads\/2026\/10\/checking-medicine-leaflet-for-implantation-rash-1024x572.jpg 1024w, https:\/\/ivfprep.guide\/articles\/wp-content\/uploads\/2026\/10\/checking-medicine-leaflet-for-implantation-rash-768x429.jpg 768w\" sizes=\"auto, (max-width: 1376px) 100vw, 1376px\" \/><figcaption class=\"wp-block-image__caption\">The leaflet in the box often explains more than the forum thread.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-else-can-cause-a-rash-in-the-two-week-wait\">What else can cause a rash in the two week wait?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Not every rash in these two weeks belongs to the fertility medicines. Some arrive alongside them simply because two weeks is long enough for ordinary life to happen.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li><strong>Antibiotics.<\/strong> Some clinics prescribe a short course around egg collection or transfer. The <a href=\"https:\/\/www.nhs.uk\/medicines\/antibiotics\/side-effects\/\" target=\"_blank\" rel=\"noopener\">NHS page on antibiotic side effects<\/a> lists a raised, itchy rash among the signs of an allergic reaction.<\/li>\n\n\n<li><strong>Adhesives and friction.<\/strong> Patch glue, plasters over injection sites, and the elastic of the loose trousers everyone suddenly owns.<\/li>\n\n\n<li><strong>Leakage from vaginal progesterone.<\/strong> The <a href=\"https:\/\/www.medicines.org.uk\/emc\/files\/pil.1283.pdf\" target=\"_blank\" rel=\"noopener\">Crinone leaflet<\/a> notes that the gel can leave a discharge for several days and that this can sometimes cause irritation. Our page on <a href=\"https:\/\/ivfprep.guide\/articles\/discharge-during-implantation\/\">discharge during the two week wait<\/a> covers what the leaflets say about that.<\/li>\n\n\n<li><strong>A rare reaction to progesterone itself.<\/strong> <a href=\"https:\/\/dermnetnz.org\/topics\/autoimmune-progesterone-dermatitis\" target=\"_blank\" rel=\"noopener\">DermNet describes autoimmune progesterone dermatitis<\/a>, a rare condition in which the body reacts to progesterone, often in people who have had progestogens before, including in fertility treatment. It is uncommon enough that it belongs on a dermatologist&#8217;s list, not a worried reader&#8217;s.<\/li>\n\n\n<li><strong>Everything else.<\/strong> Heat, a new washing powder, stress flaring an old eczema patch, and the ordinary rashes that would have turned up in any other fortnight.<\/li>\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Not one item on that list is the embryo. That is not a cold message, just an accurate one, and it is the same message whatever the rash looks like.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-do-people-on-ivf-forums-report-about-rashes\">What do people on IVF forums report about rashes?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">We read four r\/IVF threads from the past year, covering about ten accounts of skin reactions during treatment, and searched all of Reddit over the same year for the phrase implantation rash. These are what people report, not findings, and nothing in them says what any one rash means.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>In <a href=\"https:\/\/www.reddit.com\/r\/IVF\/comments\/1o9j1wc\/progesterone_in_oil_rash\/\" target=\"_blank\" rel=\"noopener\">an October 2025 thread<\/a>, a poster two weeks into progesterone in oil injections described itchy, painful welts. Her clinic changed the oil the drug was dissolved in, and she reported no improvement. One reply described a reaction that looked bad and hurt but that their clinic was not concerned about; another described a fever serious enough that the clinic called off the transfer.<\/li>\n\n\n<li>In <a href=\"https:\/\/www.reddit.com\/r\/IVF\/comments\/1rvro5f\/progesterone_rash\/\" target=\"_blank\" rel=\"noopener\">a March 2026 thread<\/a>, a poster using progesterone suppositories asked about welts on her stomach and near her armpit. Commenters guessed hives; she went to urgent care the same evening, which was the useful part of the thread.<\/li>\n\n\n<li>In <a href=\"https:\/\/www.reddit.com\/r\/IVF\/comments\/1ww17oa\/vaginal_progesterone_causing_sores\/\" target=\"_blank\" rel=\"noopener\">an October 2026 thread<\/a>, a poster using vaginal progesterone described irritation and then sores. Her doctor took a swab, and at the time of posting the result was not back. Other commenters suggested medicine swaps, which we do not repeat, because that is a decision for a clinic.<\/li>\n\n\n<li>In <a href=\"https:\/\/www.reddit.com\/r\/IVF\/comments\/1tnfo3t\/what_weird_reactions_have_you_had_to_stimulation\/\" target=\"_blank\" rel=\"noopener\">a May 2026 thread<\/a> about odd reactions to treatment, several people described rashes or itchy bumps, most of them blamed on stimulation drugs and their injections and one on progesterone suppositories; another described skin burning in the sun while on progesterone in oil.<\/li>\n\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The range ran from mildly itchy to a clinic changing the plan, and clinics responded in different ways to similar descriptions. Every account blamed a medicine or an injection, and the leaflets above back that up. The year long search for implantation rash turned up general pregnancy rash threads and nothing from an IVF or trying to conceive forum using the term. Even the forums, which are not shy about naming signs, do not seem to believe in this one.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1376\" height=\"768\" src=\"https:\/\/ivfprep.guide\/articles\/wp-content\/uploads\/2026\/10\/couple-examining-skin-irritation-implantation-rash.jpg\" alt=\"Partner gently looking at irritated skin on a forearm in a garden, a common implantation rash worry\" class=\"wp-image-598\" srcset=\"https:\/\/ivfprep.guide\/articles\/wp-content\/uploads\/2026\/10\/couple-examining-skin-irritation-implantation-rash.jpg 1376w, https:\/\/ivfprep.guide\/articles\/wp-content\/uploads\/2026\/10\/couple-examining-skin-irritation-implantation-rash-300x167.jpg 300w, https:\/\/ivfprep.guide\/articles\/wp-content\/uploads\/2026\/10\/couple-examining-skin-irritation-implantation-rash-1024x572.jpg 1024w, https:\/\/ivfprep.guide\/articles\/wp-content\/uploads\/2026\/10\/couple-examining-skin-irritation-implantation-rash-768x429.jpg 768w\" sizes=\"auto, (max-width: 1376px) 100vw, 1376px\" \/><figcaption class=\"wp-block-image__caption\">A dated photo is easier for a clinic to read than a memory.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"why-does-a-rash-or-no-rash-tell-you-nothing-about-the-result\">Why does a rash, or no rash, tell you nothing about the result?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Because the cause, in the documented cases, is the medicine, and the medicine is given whether or not an embryo implants. A rash from a patch or an injection turns up in cycles that work and cycles that do not, so it cannot sort one from the other. The same logic runs the other way: a fortnight of clear skin is not a bad sign either. For the same reasons, <a href=\"https:\/\/ivfprep.guide\/articles\/successful-implantation-without-bleeding\/\">having no bleeding and no symptoms is not evidence of anything<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There is also a quiet bias in what you can read. People post when something happens to them. Nobody writes a thread titled my skin was completely normal, so the forums fill up with rashes and leave out the far larger number of people who had none, in every kind of outcome. The only thing that answers the question is the blood test your clinic has booked, and our guide to <a href=\"https:\/\/ivfprep.guide\/articles\/beta-hcg-test-explained\/\">how the beta hCG test works<\/a> explains what it measures.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"when-does-a-rash-in-the-two-week-wait-need-a-call-to-the-cli\">When does a rash in the two week wait need a call to the clinic?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is the part to read slowly, and there are no jokes in it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Call 999 if a rash comes with swelling of the lips, tongue or throat, difficulty breathing or swallowing, wheezing, or feeling faint. The <a href=\"https:\/\/www.nhs.uk\/conditions\/anaphylaxis\/\" target=\"_blank\" rel=\"noopener\">NHS anaphylaxis page<\/a> lists these as signs of a severe allergic reaction, which needs emergency help whatever caused it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ring your clinic, or its out of hours number, the same day if a rash spreads beyond the spot where a patch or injection sits, if it comes with a fever, if it blisters or breaks into sores, or if it appears soon after starting a new medicine. The <a href=\"https:\/\/www.medicines.org.uk\/emc\/files\/pil.5569.pdf\" target=\"_blank\" rel=\"noopener\">Cyclogest leaflet<\/a> treats an itchy rash as a possible allergic reaction needing a doctor at once. Do not stop or change a fertility medicine on your own; the clinic decides that, and they would far rather hear from you than not.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a localised reaction that is bothering you, mention it at the next contact with the clinic rather than waiting until the end of the wait. The <a href=\"https:\/\/www.nhs.uk\/conditions\/hives\/\" target=\"_blank\" rel=\"noopener\">NHS page on hives<\/a> sets out when hives need an urgent GP appointment or NHS 111. Any side effect can also be reported to the MHRA through the <a href=\"https:\/\/yellowcard.mhra.gov.uk\/\" target=\"_blank\" rel=\"noopener\">Yellow Card scheme<\/a>, which is how leaflets like the ones above get their numbers.<\/p>\n\n\n\n<div class=\"msq-tool\" id=\"rash-clinic-log\">\n<h3>A log of calls to the clinic<\/h3>\n<p>If you ring the clinic about anything in the wait, this keeps the date and what they told you in one place. It records nothing else and does not interpret anything.<\/p>\n<div class=\"msq-calc\">\n<label>Date of the call<input type=\"date\" name=\"date\"><\/label>\n<label>What the clinic said<input type=\"text\" name=\"said\" maxlength=\"200\"><\/label>\n\n<div class=\"msq-calc-out\"><button type=\"button\" class=\"msq-btn\" id=\"rash-clinic-log-add\">Add this entry<\/button> <a href=\"#\" class=\"msq-no\" id=\"rash-clinic-log-clear\">Clear all<\/a>\n<div id=\"rash-clinic-log-list\" style=\"margin-top:10px;overflow-x:auto\"><\/div><\/div>\n<\/div>\n<p class=\"msq-note\">Saved on this device only. It records dates and what the clinic said, nothing more; it does not score, predict or advise.<\/p>\n<\/div>\n<script>\n(function(){\n  var root = document.getElementById('rash-clinic-log'); if (!root) { return; }\n  var names = ['date','said'], key = 'msq-log-implantation-rash-rash-clinic-log';\n  var ins = names.map(function(n){ return root.querySelector('[name=\"' + n + '\"]'); });\n  var list = document.getElementById('rash-clinic-log-list');\n  function load(){ try { return JSON.parse(localStorage.getItem(key) || '[]'); } catch (e) { return []; } }\n  function save(rows){ try { localStorage.setItem(key, JSON.stringify(rows)); } catch (e) {} }\n  function esc(s){ return String(s).replace(\/&\/g, '&amp;').replace(\/<\/g, '&lt;').replace(\/>\/g, '&gt;'); }\n  function render(){\n    var rows = load();\n    if (!rows.length) { list.innerHTML = '<p class=\"msq-note\">Nothing logged yet.<\/p>'; return; }\n    var h = '<table><thead><tr><th>Date of the call<\/th><th>What the clinic said<\/th><\/tr><\/thead><tbody>';\n    rows.slice(0, 30).forEach(function(r){ h += '<tr>' + names.map(function(n){ return '<td>' + esc(r[n] || '') + '<\/td>'; }).join('') + '<\/tr>'; });\n    list.innerHTML = h + '<\/tbody><\/table><p class=\"msq-note\">' + rows.length + ' entries, newest first.<\/p>';\n  }\n  document.getElementById('rash-clinic-log-add').addEventListener('click', function(){\n    var r = {}; var any = false;\n    ins.forEach(function(el, i){ r[names[i]] = el ? el.value : ''; if (el && el.value) { any = true; } });\n    if (!any) { return; }\n    var rows = load(); rows.unshift(r); save(rows); render();\n    ins.forEach(function(el){ if (el && el.type !== 'date') { el.value = ''; } });\n    try { if (typeof gtag === 'function') { gtag('event', 'tool_log', { tool: 'rash-clinic-log', article: 'implantation-rash' }); } } catch (e) {}\n  });\n  document.getElementById('rash-clinic-log-clear').addEventListener('click', function(e){ e.preventDefault(); save([]); render(); });\n  render();\n})();\n<\/script>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"frequently-asked-questions\">Frequently asked questions<\/h2>\n\n\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"faq-q-1\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Can implantation cause itching?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>No study links implantation to itching, and the NHS list of early pregnancy signs does not include it. Itching in the two week wait is listed in the leaflets for several transfer medicines, especially at patch and injection sites.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-q-2\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Is a rash a sign that a transfer has failed?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>No. A rash from a medicine can appear in any cycle, whatever the outcome, so it tells you nothing in either direction. Only the blood test the clinic books can answer that.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-q-3\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Why does my rash sit exactly where the patch was?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>The Evorel leaflet lists irritated, itchy skin and rash where the patch is applied as very common. If it bothers you, mention it to the clinic, who can talk through the options.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-q-4\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Are lumps at a progesterone injection site normal?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>The Lubion leaflet lists pain, redness, itching, irritation or swelling at the injection site as very common. Lumps that are hot, spreading or come with a fever need a same day call to the clinic.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-q-5\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Can a rash be an allergy to the oil in progesterone injections?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>The US label for progesterone in oil lists sesame oil allergy as a reason not to use it. Only the clinic or a doctor can work out whether an allergy is involved.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-q-6\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Should I take a photo of the rash?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Many clinics find photos useful, and a dated photo is easier to describe than a memory. Send it only through the route your clinic uses for clinical messages.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n<div class=\"msq-end\" id=\"ms-quiz-end\">\n<p><strong>Finished the page?<\/strong> The same five questions from the top, to see what stuck.<\/p>\n<button type=\"button\" class=\"msq-btn msq-start-test\">Test Your Understanding of This Article<\/button>\n<div class=\"msq-mount\"><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><em>This article is general information, not medical advice, and is not a substitute for care from a qualified healthcare professional. Speak to your doctor about your own situation.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>There is no evidence an implantation rash exists. What the leaflets for patches, pessaries and injections say about skin reactions, what forums report, and when to ring the clinic.<\/p>\n","protected":false},"author":1,"featured_media":596,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","rank_math_title":"Implantation Rash: Why It Is Not a Sign, and What Causes One","rank_math_description":"No study links an implantation rash to an embryo implanting. Rashes in the two week wait usually come from medicines, and the leaflets say how often.","rank_math_focus_keyword":"implantation rash","rank_math_canonical_url":"","rank_math_breadcrumb_title":"","rank_math_facebook_title":"","rank_math_facebook_description":"","rank_math_facebook_image":"","rank_math_twitter_title":"","rank_math_twitter_description":"","rank_math_twitter_image":"","rank_math_pillar_content":"","rank_math_robots":[],"rank_math_advanced_robots":[]},"categories":[3],"tags":[],"class_list":["post-599","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-signs-and-symptoms"],"_links":{"self":[{"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/posts\/599","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/comments?post=599"}],"version-history":[{"count":4,"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/posts\/599\/revisions"}],"predecessor-version":[{"id":604,"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/posts\/599\/revisions\/604"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/media\/596"}],"wp:attachment":[{"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/media?parent=599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/categories?post=599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ivfprep.guide\/articles\/wp-json\/wp\/v2\/tags?post=599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}