{"id":38301,"date":"2026-03-13T23:11:41","date_gmt":"2026-03-13T16:11:41","guid":{"rendered":"https:\/\/genesisfertility.co.th\/?p=38301"},"modified":"2026-06-13T23:14:14","modified_gmt":"2026-06-13T16:14:14","slug":"how-many-embryos-to-transfer","status":"publish","type":"post","link":"https:\/\/genesisfertility.co.th\/en\/how-many-embryos-to-transfer\/","title":{"rendered":"How Many Embryos Should You Transfer? Single vs Double Explained"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">&#8220;Should we transfer one embryo or two?&#8221; is one of the most common questions before embryo transfer day. Many people assume more is better \u2014 but the evidence tells a more nuanced story.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">The Two Options<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SET (Single Embryo Transfer)<\/strong> \u2014 one embryo transferred <strong>DET (Double Embryo Transfer)<\/strong> \u2014 two embryos transferred<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Direct Comparison<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><\/th><th>SET<\/th><th>DET<\/th><\/tr><\/thead><tbody><tr><td>Pregnancy rate per cycle<\/td><td>Slightly lower<\/td><td>Slightly higher<\/td><\/tr><tr><td>Twin pregnancy risk<\/td><td>Very low<\/td><td>Significantly higher<\/td><\/tr><tr><td>Preterm birth risk<\/td><td>Lower<\/td><td>Higher<\/td><\/tr><tr><td>Best suited for<\/td><td>Good quality embryo, younger patient<\/td><td>Moderate quality, previous failures<\/td><\/tr><tr><td>Current standard<\/td><td>\u2705 Recommended as default<\/td><td>Specific cases only<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Why SET Is Now the Recommended Standard<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Twin pregnancy carries more risk than most people realize<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A twin pregnancy from ICSI is not simply a &#8220;bonus&#8221; outcome. It carries significantly higher risks including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Preterm birth<\/li>\n\n\n\n<li>Low birth weight<\/li>\n\n\n\n<li>Gestational hypertension<\/li>\n\n\n\n<li>Higher likelihood of caesarean delivery<\/li>\n\n\n\n<li>NICU admission for newborns<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Cumulative success rates are comparable<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When you factor in subsequent FET cycles using frozen embryos, the overall probability of having a baby across all cycles is similar for SET and DET \u2014 but SET is considerably safer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. PGT-A makes SET more effective<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With PGT-A, only chromosomally normal embryos are transferred. The implantation rate per transfer rises substantially, making it unnecessary to transfer two embryos to improve odds.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">When DET Might Be Considered<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Despite SET being the standard, there are specific cases where DET may be discussed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Older patients with moderate embryo quality<\/li>\n\n\n\n<li>Multiple unexplained failed cycles<\/li>\n\n\n\n<li>No PGT-A performed and uncertain embryo quality<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This is always an individual discussion with your treating doctor.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"faq-question-1781367167836\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>Is the success rate much lower with SET?<\/strong> <\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Per cycle, it may be slightly lower. But cumulative success across all cycles (including frozen transfers) is comparable \u2014 and SET is significantly safer.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1781367177487\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>We&#8217;d like twins \u2014 can we request two embryos?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Your doctor will discuss this based on your specific situation. It&#8217;s important to understand that twin pregnancies carry meaningful medical risks for both mother and babies.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1781367185073\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>If SET doesn&#8217;t work, do I have embryos left for another try?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>If you have frozen embryos remaining, yes \u2014 FET in a subsequent cycle is an option. Your doctor will discuss this during treatment planning.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1781367192812\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>Does PGT-A make SET more viable?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Yes. PGT-A selects chromosomally normal embryos, which have significantly higher implantation rates \u2014 making SET effective enough that the incremental benefit of DET is reduced<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1781367202352\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>Who makes the final decision on how many embryos to transfer?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Your doctor will make a recommendation based on your situation, but the decision is ultimately yours. All options and their trade-offs will be explained clearly before transfer day.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1781367216512\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><strong>Where can I discuss embryo transfer options at GFC?<\/strong><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Line @gfcclinic or call 097-484-5335.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Current international guidelines recommend SET (single embryo transfer) as the default \u2014 particularly when PGT-A is used. Cumulative success rates are comparable to DET, while the risks associated with twin pregnancy are avoided.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2192 Learn about PGT-A \u2192 <a href=\"\/en\/pgta-embryo-screening-success-rate\/\">PGT-A Explained<\/a> \u2192 ICSI at GFC \u2192 <a href=\"\/en\/services\/services-ivf-icsi-treatment\/\">ICSI Treatment<\/a> \u2192 <a href=\"\/en\/contact\/\">Book a Free Consultation<\/a> or Line @gfcclinic | Tel: 097-484-5335<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;Should we transfer one embryo or two?&#8221; is one of the most common questions before&hellip;<\/p>\n","protected":false},"author":22,"featured_media":30538,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[448],"tags":[],"class_list":["post-38301","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/posts\/38301","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/comments?post=38301"}],"version-history":[{"count":1,"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/posts\/38301\/revisions"}],"predecessor-version":[{"id":38302,"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/posts\/38301\/revisions\/38302"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/media\/30538"}],"wp:attachment":[{"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/media?parent=38301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/categories?post=38301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/genesisfertility.co.th\/en\/wp-json\/wp\/v2\/tags?post=38301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}