IVF Due Date Calculator
Calculate your exact estimated delivery date and gestational age milestones following IVF embryo transfer, egg retrieval, or IUI.
Calculate IVF Delivery Date
Select your assisted reproductive technology protocol.
The Mathematics of ART Pregnancy Dating
- Day 3 Embryo Transfer:
Transfer Date + 263 days(Gestational age at transfer = 2w 3d) - Day 5 Blastocyst Transfer:
Transfer Date + 261 days(Gestational age at transfer = 2w 5d) - Day 6 Blastocyst Transfer:
Transfer Date + 260 days(Gestational age at transfer = 2w 6d) - Egg Retrieval / IUI:
Procedure Date + 266 days(Gestational age at procedure = 2w 0d)
When to See a Doctor
Online calculators provide general estimates based on biological averages. Consult a healthcare provider (such as an OB/GYN or general practitioner) if you notice:
- Your periods suddenly become irregular after being consistent
- Your cycle is consistently shorter than 21 days or longer than 35 days
- Your period bleeding lasts longer than 7 days or is unusually heavy (soaking through a pad/tampon every hour)
- You experience severe, debilitating pelvic pain or cramping that disrupts daily life
- You experience bleeding between periods or after intercourse
- You are under 35 and have been trying to conceive for 12 months (or 6 months if 35+)
- Your period has stopped completely for 90 days or more (and you are not pregnant)
Frequently Asked Questions
Evidence-based answers to common questions about your cycle and fertility.
How is an IVF due date calculated for a Day 5 blastocyst transfer?
A Day 5 blastocyst is already 5 days old at transfer (equivalent to 2 weeks + 5 days gestational age). The due date is calculated by adding 261 days to the transfer date (266 − 5 = 261).
Why is IVF dating considered more precise than natural conception dating?
In IVF, the exact hour and day of fertilization (egg retrieval/ICSI) and embryo transfer are clinically documented in the laboratory, eliminating uncertainty regarding ovulation timing.
Due Date Calculator
Calculate your estimated baby due date, current gestational age, trimester, and weekly milestones from your LMP, conception, or ultrasound date.
Pregnancy Week Calculator
Calculate how many weeks and days pregnant you are today, identify your current trimester, and view baby developmental milestones.
Conception Calculator
Estimate your probable conception dates and fertile window from your last period, ultrasound, or due date. Pure client-side calculations.
Medical & Scientific Sources
- American Society for Reproductive Medicine (ASRM)(2021). "Guidance on dating pregnancies resulting from Assisted Reproductive Technology"