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IVF due date calculator
Estimate your due date based on embryo transfer date and embryo age.
Estimate, not a diagnosis. This tool gives an educational estimate based on the numbers you enter. It cannot account for your individual health history — consult a healthcare professional for anything clinical.
Background
IVF dating uses the embryo age at transfer to estimate gestational age. A commonly used formula adds a standard number of days, based on embryo age, to the transfer date to estimate the due date.
Limitations
Different clinics sometimes use slightly different conventions — confirm with your fertility team for official dating.
Related reading
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Frequently asked questions
How is an IVF due date different from a natural conception due date?
IVF dating uses the known embryo transfer date and the embryo’s exact age at transfer (e.g., a 5-day blastocyst), which removes the guesswork around ovulation timing that natural-conception dating relies on — making it generally more precise.
Does a 5-day transfer give a different due date than a 3-day transfer?
The calculation accounts for embryo age at transfer, so a 5-day blastocyst transfer and a 3-day transfer on different calendar dates can still arrive at consistent due dates once that age is factored in.
Should I use my clinic’s due date or this calculator’s?
Different clinics sometimes use slightly different conventions for the calculation. Your fertility clinic’s official dating should take precedence over this estimate.