IVF Due Date Calculator
Estimate your due date from your embryo transfer, adjusted for embryo age.
Awaiting Data
Enter your details and tap Calculate to see your results appear here.
Your result appears here.
What it measures
IVF gives an unusually precise due date. Doctors know the exact day eggs were fertilised, so dating skips the usual guesswork. Embryo age at transfer matters too, since a Day 5 blastocyst is further along than a Day 3 embryo.
This tool counts forward from your transfer, adjusting for embryo age, then tracks your current week. For a retrieval based view, try our IVF Birth Calculator.
How to use this calculator
- Enter your embryo transfer date.
- Pick the embryo age at transfer.
- Tap Calculate for your due date and progress.
The formula used
- transfer date
- Day the embryo was placed.
- embryo age
- 3, 5, or 6 days old.
Understanding Your Results
Tips to Improve
- Confirm dating at your first scan.
- Keep taking prescribed support medicines.
- Note your transfer day for records.
- Ask your clinic any timing questions.
Day 3 against Day 5 transfers
Embryo age shifts the count by a couple of days, and this tool handles it for you. A Day 5 blastocyst has grown longer in the lab, so fewer days remain until birth than with a Day 3 embryo. Clinics pick the day from embryo quality and your history, and both lead to healthy pregnancies.
Whatever the day, the math stays precise. Fertilisation timing is known, so the estimate beats a natural cycle count. Follow each week with our Pregnancy Calculator, or compare a retrieval based date using the IVF Birth Calculator.
What happens after the estimate
An early scan checks the heartbeat and confirms dating, often near week 7. Routine visits then track growth and wellbeing. Keep any prescribed progesterone going until your clinic says otherwise. For broader guidance on assisted reproduction, the National Institutes of Health offers current reading.
Frequently Asked Questions
An older embryo is closer to birth, so fewer days remain.
Yes, among the most precise, since fertilisation timing is known.
Both are precise. The tool adjusts the count for each.
Scientific References
- American College of Obstetricians and Gynecologists. (2017). Estimating the due date. Committee Opinion 700.
- Society for Assisted Reproductive Technology. (2023). IVF and dating.