IVF Due Date Calculator

Free IVF Due Date Calculator

This free IVF due date calculator estimates your expected delivery date based on your embryo transfer date (day 3 or day 5) or your egg retrieval date. Because IVF pregnancies have precisely known key dates, this calculator can be more accurate than one based on your last menstrual period.

IVF due dates use the egg retrieval date as the equivalent of ovulation. From a day 5 blastocyst transfer, we add 261 days. From a day 3 transfer, we add 263 days. From an egg retrieval date, we add 266 days, which is the standard 280-day pregnancy length minus the roughly 14 days between the last period and ovulation.

How to Use the IVF Due Date Calculator

• Choose whether to calculate from your embryo transfer date or your egg retrieval date.
• Enter the requested date, and select day 3 or day 5 if using your transfer date.
• Click Calculate Due Date.
• View your estimated due date, current gestational age, and trimester milestones.
• Use the Print, Share, Copy, or Download buttons to save your results.

Features

• Calculate from a day 3 or day 5 embryo transfer, or your egg retrieval date.
• Shows your current gestational age based on IVF dating.
• Displays your trimester milestone dates.
• Mobile-friendly with print, share, copy, and download options.

Frequently Asked Questions

How is an IVF due date calculated?

IVF due dates use the known date of egg retrieval or embryo transfer instead of estimating ovulation from your last period. For a day 5 blastocyst transfer, we add 261 days to the transfer date. For a day 3 transfer, we add 263 days. From an egg retrieval date, we add 266 days.

Is an IVF due date more accurate than one based on my last period?

Yes, generally. Because the egg retrieval and fertilization dates are precisely known in IVF, dating is typically more accurate than an estimate based on the first day of your last period, which relies on assumptions about cycle length and ovulation timing.

Why is a day 5 transfer calculated differently from a day 3 transfer?

The embryo's age at transfer is subtracted from the standard 266 days counted from conception. A day 5 blastocyst is already 5 days old at transfer, so only 261 more days are added. A day 3 embryo is 3 days old, so 263 more days are added.

Can this calculator confirm my exact due date for medical purposes?

No. This calculator gives a general estimate based on standard clinical conventions. Your fertility clinic or doctor will confirm your due date, typically using an early ultrasound, which is considered the most accurate dating method.

Method and Sources

For pregnancies conceived through IVF, ACOG recommends assigning the due date from the age of the embryo and the date of transfer rather than from a last period. This calculator adds 261 days to a day 5 blastocyst transfer, 263 days to a day 3 transfer, or 266 days to an egg retrieval date. Each of these lands on the same due date as a 280-day pregnancy counted from an equivalent last period.

Your fertility clinic or obstetrician will confirm your official due date, which may be adjusted after an ultrasound.

Sources:

• American College of Obstetricians and Gynecologists (ACOG) — Committee Opinion No. 700: Methods for Estimating the Due Date

This calculator is for general information only and is not medical advice. Read our Calculation Methodology and medical disclaimer.

Related Calculators

Want to track your days past transfer and beta hCG test date? Try our IVF transfer calculator. Conceived naturally and want a broader estimate? Use our pregnancy due date calculator. Want to see your current week and trimester? Check the pregnancy week calculator or the pregnancy trimester calculator. Want a full milestone timeline from your transfer date, including your beta hCG test date? Try our embryo transfer calculator.