IVF Due Date Calculator
Calculate IVF Due Date
Enter your transfer date and embryo age
Formula
IVF Due Date = Transfer Date + (266 - Embryo Age in days) | Day 5: Due = Transfer + 261 days | Day 3: Due = Transfer + 263 days
Frequently Asked Questions
How is an IVF due date calculated?
IVF due dates are calculated from the embryo transfer date. For a day 5 (blastocyst) transfer: Due Date = Transfer Date + 261 days. For a day 3 transfer: Due Date = Transfer Date + 263 days. This accounts for the 266-day gestation minus the embryo age.
Is an IVF due date more accurate than a natural conception due date?
Yes. IVF due dates are typically more accurate because the exact date of fertilization and embryo age are known, eliminating the uncertainty of when ovulation and conception occurred naturally.
What is the difference between day 3 and day 5 transfer?
A day 3 embryo (cleavage stage) has 6-8 cells. A day 5 embryo (blastocyst) has over 100 cells and has begun differentiating. Blastocyst transfers often have higher implantation rates because embryos that survive to day 5 are typically stronger.
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