IVF Due Date Calculator
For a 5-day blastocyst transfer, add 261 days to the transfer date. For a 3-day transfer, add 263 days. IVF due dates are typically more precise than LMP-based dates since the exact fertilization and transfer dates are known.
Due Date
Thu, November 19, 2026
224 days remaining
Currently Pregnant
8w 0d
Trimester
First Trimester
Key Milestones
Week 8 — Heartbeat detectable
Thu, April 9, 2026
Week 12 — End of first trimester
Thu, May 7, 2026
Week 20 — Anatomy / anomaly scan
Thu, July 2, 2026
Week 28 — Viability milestone
Thu, August 27, 2026
Week 36 — Full term approaching
Thu, October 22, 2026
Week 40 — Due date
Thu, November 19, 2026
Naegele's rule: due date = LMP + 280 days (40 weeks). Trimesters: T1 = weeks 1-13, T2 = weeks 14-27, T3 = weeks 28-40. Always confirm with your healthcare provider.
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Common questions about IVF Due Date Calculator
How do I calculate IVF due date from transfer date?
For a Day 5 blastocyst transfer: due date = transfer date + 261 days. For a Day 3 transfer: add 263 days. For a Day 2 transfer: add 264 days. This equals the standard 40 weeks from LMP, adjusted for the known embryo age at transfer.
Are IVF pregnancies higher risk?
IVF pregnancies have slightly higher rates of multiples (if more than one embryo transferred), preterm birth, and low birth weight. Single embryo transfers (SET) have outcomes very close to natural conception. Most IVF singleton pregnancies progress normally and deliver healthy babies.
Does IVF change the due date calculation?
The due date math is identical - 40 weeks total. The only difference is the starting reference point. With IVF you use embryo age at transfer instead of LMP. An OB will often confirm and adjust dates based on 8-12 week ultrasound measurements regardless of how conception occurred.