When is your IVF baby due?
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Medical Disclaimer: This tool provides general educational estimates. Always consult your prescribing physician or healthcare provider before making medication changes or interpreting results from population-based models.
Frequently Asked Questions
An IVF due date is calculated from the embryo transfer date rather than the last menstrual period. For a Day 5 blastocyst transfer, add 261 days to the transfer date. For a Day 3 embryo transfer, add 263 days. This follows ACOG Committee Opinion No. 700.
Yes. IVF due dates are among the most accurate because the exact date of fertilization or transfer is known, eliminating uncertainty from irregular cycles or ovulation timing. Studies show IVF dating matches ultrasound dating within 1-3 days.
No. Whether the embryo was frozen (FET) or fresh does not change the due date calculation. The formula depends on the embryo's age at transfer (Day 3, Day 5, or Day 6), not whether it was previously frozen.
The first ultrasound after IVF is typically scheduled at 6-8 weeks gestational age. For a Day 5 transfer, this is approximately 3-5 weeks after transfer day.
Gestational age after IVF is calculated by adding the embryo's age at transfer plus 14 days (to convert to LMP-equivalent dating) to the number of days since transfer. For example, 10 days after a Day 5 transfer: 10 + 5 + 14 = 29 days = 4 weeks 1 day gestational age.
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