IVF Transfer Due Date Calculator (Day 3 / 5 / 6)
Estimate your IVF due date by embryo transfer day. Covers fresh, frozen, donor and surrogate cycles.
IVF transfer due date by embryo stage — private & instantEstimates only — not medical advice. Confirm all dates and milestones with your doctor or midwife. Read our full disclaimer.
How this due date is calculated
Pick your embryo transfer type, then enter the transfer (or thaw) date. The due date is the transfer date plus the standard offset for that embryo stage: Day-3 +263, Day-5 +261, Day-6 +260, frozen/donor/surrogate +261 days.
IVF dating is unusually precise because the transfer day is exact and the embryo’s stage is known. The offset (Day-3 +263, Day-5 +261, Day-6 +260, frozen/donor/surrogate +261) simply converts "days since transfer" into the LMP-equivalent gestational age your clinic uses. Because there is no guessing about when ovulation happened, IVF due dates need less correction from an early scan than LMP-based ones do.
What to expect
IVF due dates are counted from the embryo transfer, not from a last period. The calculator adds a fixed number of days based on how mature the embryo was at transfer. Use the dropdown above to pick your transfer type — the offset changes with the embryo stage, which is why a single "IVF due date" formula does not fit every cycle.
Fresh Day-3 embryo (+263 days)
A Day-3 transfer uses an early cleavage-stage embryo, usually 6 to 8 cells. Because it has a couple more days of development ahead before it would "catch up" to a blastocyst, the due date is transfer date plus 263 days. This is sometimes called the "3-day embryo" method.
Fresh Day-5 blastocyst (+261 days)
By Day 5 the embryo has reached the blastocyst stage and is more developed at transfer. The due date is transfer date plus 261 days. Day-5 is the most common fresh transfer stage, so it is the default above.
Fresh Day-6 blastocyst (+260 days)
Some blastocysts are transferred on Day 6 if they needed an extra day to reach the right quality. The due date is transfer date plus 260 days — one day less than Day-5, reflecting the extra day of development already completed.
Frozen embryo transfer / FET (+261 days)
A frozen transfer uses a thawed blastocyst (usually Day-5 or Day-6 quality). The due date is counted from the thaw/transfer date using the Day-5 offset (about +261 days). The freeze itself does not change the math; what matters is the transfer day and the embryo's stage.
Donor egg (+261 days)
With a donor egg, the pregnancy clock follows the carrying mother's cycle, not the donor's. Enter the transfer date for the recipient; the offset is the same Day-5 value (+261 days). The donor's age or cycle does not enter the due-date calculation.
Surrogate (+261 days)
For a gestational surrogate, the due date is calculated from the surrogate's transfer date using the Day-5 offset (+261 days), exactly like a recipient cycle. The intended parents' dates are irrelevant to the math.
Example: a Day-5 fresh transfer on February 1 gives an estimated due date around October 19. Change the dropdown to Day-3 and the same transfer date shifts the due date about two days later.
These offsets are conventions used by many clinics and due-date wheels. Your clinic may use a slightly different rule, and an early ultrasound is still the most accurate dating method during IVF.
Important note
These calculators use standard formulas — Naegele's rule (LMP + 280 days) and common IVF conventions (transfer date + 260–263 days). They give estimates for planning only. They are not a substitute for prenatal care, and only your provider can confirm your due date and track your baby's development. See the disclaimer for details.
FAQ
IVF day 3 vs day 5 due date — what is the difference?
Day-3 embryos are less mature at transfer, so the due date is transfer +263 days. Day-5 blastocysts are more developed, so it is transfer +261 days. Day-6 is +260 days.
How is a frozen embryo transfer due date calculated?
Use the thaw/transfer date with the Day-5 offset (+261 days). The freeze does not change the due date; only the transfer day and embryo stage matter.
Donor egg due date — whose LMP counts?
The due date follows the carrying mother (recipient or surrogate). Enter her transfer date; the offset is Day-5 (+261 days). The donor’s cycle is not used.
Surrogate due date calculator
Same as a recipient cycle: use the surrogate’s transfer date with the Day-5 offset (+261 days).
What is IVF beta hCG and when is it tested?
Beta hCG is the pregnancy hormone measured in a blood test, usually about 9–14 days after transfer, to confirm pregnancy. This tool estimates the due date; for beta timing and results, follow your clinic’s schedule.
Gestational age calculator for IVF
With IVF, gestational age is more precise because the transfer date is known. It is transfer date + offset − today. The "How far along am I" tool shows your current week from a due date.
IVF pregnancy week calculator
Enter your due date in the How far along tool to see your current IVF pregnancy week and days.
What date do I enter for IVF transfer?
Enter the actual embryo transfer or thaw date — not your due date or retrieval date. The calculator does the rest based on the embryo stage you select.