IVF Pregnancy Due Date Calculator
Due date from your embryo transfer date and embryo age. Free, private and instant.
How to use the IVF Due Date
- Pick embryo transfer date.
- Choose age of the embryo at transfer: Day 3 embryo, Day 5 blastocyst or Day 6 blastocyst.
- Press Calculate to get an instant result with a colour scale, chart and plain-English explanation.
About the IVF Due Date
With IVF the exact day of conception is known, which makes dating more precise. Enter your embryo transfer date and the age of the embryo to get your due date, gestational age today, the date for your beta hCG blood test and early scan dates.
Also known as: IVF due date calculator, embryo transfer due date, day 5 transfer due date, FET due date calculator.
Worked example
Dates in this example are worked out as if today were 5 Nov 2026.
- Embryo transfer date: 6 Sept 2026
- Age of the embryo at transfer: Day 5 blastocyst
Days until your due date: 201 days (Due 25 May 2027). A day 5 embryo transferred on 6 Sept 2026 gives an estimated due date of Tue, 25 May 2027. Today you are about 11 weeks 2 days pregnant.
- Estimated due date: 25 May 2027
- Pregnant today: 11 weeks 2 days
- Beta hCG blood test: 15 Sept 2026
- Home test (earliest): 16 Sept 2026
Formula and cut-offs
Due date = transfer date + 266 days - embryo age in days (day 5 transfer: transfer + 261 days). Gestational age = embryo age + 14 days at the time of transfer. Beta hCG test about 9-11 days after a day-5 transfer.
Frequently asked questions
How is an IVF due date calculated?
Add 266 days to the date of fertilisation, which means 261 days after a day-5 transfer or 263 days after a day-3 transfer.
When should I take a pregnancy test after embryo transfer?
Usually a blood test 9 to 11 days after a day-5 transfer. Early home tests can mislead, especially after a trigger shot.
Is an IVF due date more accurate?
Often yes, because the conception date is known, but your clinic will confirm dating at the first scan.
What is the due date for a day 5 blastocyst transferred on 6 Sept 2026?
A day 5 embryo transferred on 6 Sept 2026 gives an estimated due date of Tue, 25 May 2027. Today you are about 11 weeks 2 days pregnant. This example treats 5 Nov 2026 as today. Enter your own dates above for a personal result.
Sources and references
- ACOG Committee Opinion 700 - Methods for estimating the due date
- Institute of Medicine (2009) - Weight Gain During Pregnancy: Reexamining the Guidelines
- NHS - Pregnancy guide
Written and checked by the MediHub editorial team against the sources above. Read how we build and review our calculators.
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Last updated . This calculator is for education only and is not medical advice. See the medical disclaimer.