{"id":67175,"date":"2026-10-20T09:51:47","date_gmt":"2026-10-20T06:51:47","guid":{"rendered":"https:\/\/wpcalc.com\/en\/?p=67175"},"modified":"2026-10-20T09:51:47","modified_gmt":"2026-10-20T06:51:47","slug":"ivf-due-date-calculator","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/pregnancy-baby\/ivf-due-date-calculator\/","title":{"rendered":"IVF Due Date Calculator"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 id=\"calculator-title\" class=\"text-lg font-display font-bold\">Estimate Your Due Date from an IVF Date<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"67175\" data-favorite-title=\"IVF Due Date\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/ivf-due-date-calculator\/\" data-favorite-excerpt=\"Estimate an IVF due date from an embryo transfer, egg retrieval, or fertilization date. Choose your IVF method and enter the relevant date to see your due date and pregnancy milestones.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-embryo\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/ivf-due-date-calculator\/\" method=\"POST\" class=\"calculator\" id=\"calculator-67175\" data-post=\"67175\"><fieldset class=\"fieldset-input is-1\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field\" id=\"input-1\"><label for=\"field-1\">IVF method<\/label><div class=\"grid grid-cols-1\"><select id=\"field-1\" name=\"ivf_method\"><option value=\"day3\">Day-3 embryo transfer<\/option><option value=\"day5\" selected>Day-5 blastocyst transfer<\/option><option value=\"day6\">Day-6 blastocyst transfer<\/option><option value=\"retrieval\">Egg retrieval<\/option><option value=\"donor_fresh\">Fresh donor egg<\/option><option value=\"donor_frozen\">Frozen donor egg<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><div class=\"field\" id=\"input-2\"><label for=\"field-2\">Transfer, retrieval, or fertilization date<\/label><input type=\"date\" name=\"transfer_retrieval_or_fertilization_date\" id=\"field-2\" aria-describedby=\"calc-info-2\" step=\"any\" value=\"2026-09-15\"\/><small id=\"calc-info-2\">For a frozen donor egg, use the fertilization date\u2014not the date the egg was originally retrieved.<\/small><\/div><div class=\"field\" id=\"input-3\" hidden><label for=\"field-3\">Donor egg date type<\/label><div class=\"grid grid-cols-1\"><select id=\"field-3\" name=\"donor_egg_date_type\"><option value=\"transfer\" selected>Embryo transfer date<\/option><option value=\"day0\">Egg retrieval or fertilization date (day 0)<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><div class=\"field\" id=\"input-4\" hidden><label for=\"field-4\">Embryo age at donor egg transfer<\/label><div class=\"grid grid-cols-1\"><select id=\"field-4\" name=\"embryo_age_at_donor_egg_transfer\"><option value=\"3\">Day 3<\/option><option value=\"5\" selected>Day 5<\/option><option value=\"6\">Day 6<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"67175\">Calculate<\/button><button type=\"reset\">Reset<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calculate automatically<\/label><small>If enabled, the result will update automatically when you change any value.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Your IVF Pregnancy Dates<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Estimated due date<\/span><\/span><span class=\"field-value\" id=\"result-1\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-2\"><span class=\"field-title\"><span>Equivalent last menstrual period (LMP) date<\/span><\/span><span class=\"field-value\" id=\"result-2\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-3\"><span class=\"field-title\"><span>Current gestational age<\/span><\/span><span class=\"field-value\" id=\"result-3\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-4\"><span class=\"field-title\"><span>Current trimester<\/span><\/span><span class=\"field-value\" id=\"result-4\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-5\"><span class=\"field-title\"><span>End of first trimester (13 weeks, 6 days)<\/span><\/span><span class=\"field-value\" id=\"result-5\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-6\"><span class=\"field-title\"><span>20-week anatomy scan date<\/span><\/span><span class=\"field-value\" id=\"result-6\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-7\"><span class=\"field-title\"><span>37 weeks (early term)<\/span><\/span><span class=\"field-value\" id=\"result-7\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-8\"><span class=\"field-title\"><span>39 weeks (full term)<\/span><\/span><span class=\"field-value\" id=\"result-8\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><div class=\"field-result is-column\" id=\"output-9\"><span class=\"field-title\"><span>How these dates are estimated<\/span><\/span><span class=\"field-value\" id=\"result-9\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copy link to this calculation<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Leave a Comment<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"67175\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">How did this result make you feel?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Like <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">Helpful <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confused <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Disappointed <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\u274c <\/span><span class=\"reaction-description font-medium\">Inaccurate <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>IVF Due Date Formula<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">Formula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\n\\[D = T + (266-a)\\text{ days},\\qquad L = D - 280\\text{ days}\\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(D\\) \u2014 estimated due date<\/li>\n<li>\\(T\\) \u2014 entered transfer, retrieval, or fertilization date<\/li>\n<li>\\(a\\) \u2014 embryo age in days on the entered date: 3, 5, or 6 for a transfer; 0 for retrieval or fertilization<\/li>\n<li>\\(L\\) \u2014 equivalent last menstrual period (LMP) date<\/li>\n<\/ul>\n<p>The calculation places the due date 266 days after fertilization, or the corresponding number of days after an embryo transfer. The equivalent LMP is a dating reference, not necessarily the date of an actual period.<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-459\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>IVF Due Date \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> a day-5 blastocyst is transferred on September 15, 2026, using the calculator\u2019s default settings.<\/p>\n<p>\\[D = \\text{September 15, 2026} + (266-5)\\text{ days} = \\text{June 3, 2027}\\]<\/p>\n<p>\\[L = \\text{June 3, 2027} - 280\\text{ days} = \\text{August 27, 2026}\\]<\/p>\n<p><strong>Result:<\/strong> the estimated due date is June 3, 2027, and the equivalent LMP date is August 27, 2026. The 20-week mark falls on January 14, 2027.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to use the calculator<\/h2>\n<ol>\n<li>Under <strong>IVF method<\/strong>, choose Day-3 embryo transfer, Day-5 blastocyst transfer, Day-6 blastocyst transfer, Egg retrieval, Fresh donor egg, or Frozen donor egg.<\/li>\n<li>Enter the relevant day in <strong>Transfer, retrieval, or fertilization date<\/strong>. For a frozen donor egg, enter its fertilization date after thawing if you are using a day-0 date\u2014not the date it was originally retrieved.<\/li>\n<li>If you selected a donor egg method, set <strong>Donor egg date type<\/strong> to Embryo transfer date or Egg retrieval or fertilization date (day 0), as appropriate.<\/li>\n<li>If the donor egg date is an embryo transfer, choose Day 3, Day 5, or Day 6 under <strong>Embryo age at donor egg transfer<\/strong>. This is the embryo\u2019s age on the transfer date.<\/li>\n<li>Read <strong>Estimated due date<\/strong> alongside the equivalent LMP date, current gestational age, trimester, and milestone dates. Check that the entered date and method match your clinic\u2019s records.<\/li>\n<\/ol>\n<h2>Understanding an IVF due date<\/h2>\n<p>An IVF due date uses a known treatment date and the embryo\u2019s age instead of estimating conception from a menstrual period. A day-5 transfer, for example, is treated as occurring five days after fertilization, so the calculator adds 261 days to the transfer date. For egg retrieval or fertilization entered as day 0, it adds 266 days. A fresh donor egg retrieval is treated as day 0; for a frozen donor egg, day 0 is fertilization after thawing.<\/p>\n<p>Pregnancy is conventionally described in gestational weeks counted from an LMP date, roughly two weeks before fertilization. The calculator therefore places the equivalent LMP 280 days before the due date. It uses that reference to calculate gestational age and trimester for today, plus the end of the first trimester at 13 weeks and 6 days. The equivalent LMP does not imply that you had a menstrual period on that day.<\/p>\n<p>The other dates are milestones, not appointments: the anatomy scan date is the 20-week mark, 37 weeks marks early term, and 39 weeks marks the start of full term. An estimated due date is a reference point rather than a prediction of the exact day of birth. If you want to compare dating methods, the <a href=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/pregnancy-due-date\/\">Pregnancy Due Date Calculator<\/a> offers a general pregnancy date estimate.<\/p>\n<h2>Assumptions and practical tips<\/h2>\n<p>Use the embryo\u2019s actual age at transfer, not the number of days since you began medication or since an egg was frozen. For donor egg cycles, the <strong>Donor egg date type<\/strong> determines whether the entered date represents a transfer or day 0. Selecting the wrong type can shift the estimate by several days. Check your transfer summary if you are unsure whether the embryo was day 3, day 5, or day 6.<\/p>\n<p>The calculation assumes a 266-day interval from fertilization to the due date. It does not account for individual differences in pregnancy length, a clinic\u2019s revised dating, or decisions about scan timing. Your fertility or maternity care team can confirm which due date should be used in your medical record. The displayed 20-week date is a gestational milestone; it does not mean your anatomy scan must happen on that exact day.<\/p>\n<p>Current gestational age and trimester update with the day you view the calculator. If the entered IVF date is in the future, gestational age is not yet shown; well beyond the expected pregnancy window, it is no longer treated as a current pregnancy. For other stage-specific calculations, see the <a href=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/hcg-doubling-time-calculator\/\">hCG Doubling Time Calculator<\/a> for serial early blood tests or the <a href=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/fetal-weight-estimate-calculator\/\">Fetal Weight Estimate Calculator<\/a> for later ultrasound measurements.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Estimate an IVF due date from an embryo transfer, egg retrieval, or fertilization date. Choose your IVF method and enter the relevant date to see your due date and pregnancy milestones.<\/p>\n","protected":false},"author":3168,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[45],"tags":[47],"class_list":["post-67175","post","type-post","status-publish","format-standard","hentry","category-pregnancy-baby","tag-pregnancy-tracking"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/67175","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/users\/3168"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/comments?post=67175"}],"version-history":[{"count":1,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/67175\/revisions"}],"predecessor-version":[{"id":67198,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/67175\/revisions\/67198"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=67175"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=67175"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=67175"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}