IVF Due Date Calculator
Estimate your due date after IVF embryo transfer.
Supports both Day 3 and Day 5 (blastocyst) transfers.
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Estimated Due Date
IVF due date is calculated differently from natural conception because the exact date of embryo creation is known.
For Day 5 (Blastocyst) Transfer:
Due Date = Transfer Date + 261 days (38 weeks minus 5 days)
This is equivalent to: Transfer Date + 261 days
For Day 3 Transfer:
Due Date = Transfer Date + 263 days (38 weeks minus 3 days)
This is equivalent to: Transfer Date + 263 days
How it works:
- A full-term pregnancy is 266 days (38 weeks) from conception
- For a Day 5 transfer, the embryo is already 5 days old, so: 266 - 5 = 261 days
- For a Day 3 transfer, the embryo is already 3 days old, so: 266 - 3 = 263 days
Key milestones:
- First ultrasound: 6–8 weeks
- End of first trimester: 12 weeks
- Anatomy scan: 18–22 weeks
- Viability: 24 weeks
- Full term: 37–42 weeks
Note: Your reproductive endocrinologist may adjust your due date based on ultrasound measurements. Only about 5% of babies arrive on their exact due date.