{"id":41621,"date":"2024-06-08T20:02:31","date_gmt":"2024-06-08T13:02:31","guid":{"rendered":"https:\/\/genesisfertility.co.th\/how-to-calculate-ivf-pregnancy-age\/"},"modified":"2026-09-08T07:48:29","modified_gmt":"2026-09-08T00:48:29","slug":"how-to-calculate-ivf-pregnancy-age","status":"publish","type":"post","link":"https:\/\/genesisfertility.co.th\/en\/how-to-calculate-ivf-pregnancy-age\/","title":{"rendered":"How to Calculate Pregnancy Age After IVF and Embryo Transfer"},"content":{"rendered":"\t\t
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If you become pregnant after IVF or ICSI, pregnancy is still measured in gestational weeks, just like a naturally conceived pregnancy. The difference is how the pregnancy is dated. For patients who are not yet pregnant, learn more about IVF treatment in Bangkok<\/a>, including how embryos are created, cultured, and transferred.<\/p>

With IVF, the fertility team knows the embryo’s developmental age and the embryo transfer date. These dates allow the pregnancy to be dated more precisely using the assisted reproductive technology (ART) timeline.<\/p>

For example, a Day 3 embryo is considered approximately 2 weeks and 3 days pregnant on the day of transfer, while a Day 5 embryo is approximately 2 weeks and 5 days pregnant.<\/p>

Understanding this calculation can help patients interpret pregnancy tests, ultrasound results and estimated due dates after IVF. Before choosing a provider, use this guide on how to choose an IVF clinic in Bangkok<\/a> to evaluate specialist experience, laboratory standards, success-rate definitions, package inclusions, and international-patient support. <\/p>

How Do You Calculate Pregnancy Age After IVF?<\/h2>

The basic formula is:<\/p>

Gestational age = 14 days + embryo age at transfer + days since embryo transfer<\/strong><\/p>

The ACOG guidelines on IVF pregnancy dating<\/a> provide standardized formulas for calculating gestational age and estimated due dates based on embryo transfer date and embryo age. <\/p>

Quick Reference<\/h3>

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Embryo transferred<\/th>\n Gestational age on transfer day<\/th>\n <\/tr>\n <\/thead>\n
Day 3 embryo<\/td>\n 2 weeks + 3 days<\/td>\n <\/tr>\n
Day 5 embryo<\/td>\n 2 weeks + 5 days<\/td>\n <\/tr>\n
Day 6 embryo<\/td>\n 2 weeks + 6 days<\/td>\n <\/tr>\n \n <\/tbody>\n<\/table>
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For example, if a Day 5 embryo was transferred 10 days ago:<\/p>

14 days + 5 days + 10 days = 29 days<\/strong><\/p>

That equals:<\/p>

4 weeks + 1 day pregnant<\/strong><\/p>

The same principle applies to a frozen embryo transfer (FET). The embryo’s developmental age and transfer date are used to establish the ART-derived gestational age.<\/p>

Important:<\/strong> Gestational age is not the same as the embryo’s biological age. Pregnancy is conventionally dated from approximately two weeks before fertilization. This is why an IVF pregnancy can already be considered about two weeks pregnant on the day of embryo transfer.<\/p>

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"gestational\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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