IVF Due Date Calculator – Find Your Estimated Delivery Date
The IVF Due Date Calculator helps you estimate your expected delivery date (EDD) based on your embryo transfer or egg retrieval date. Unlike natural conception, IVF pregnancies have a precisely known conception timeline, making due date calculation very accurate. Simply enter your transfer type and date to instantly find your estimated due date, current gestational age, and trimester.
Select whether you had a fresh or frozen transfer and the embryo stage, or enter your egg retrieval date.
Enter the date of your embryo transfer or egg retrieval in YYYY-MM-DD format.
Your results will appear here
How to Use This Calculator
1. Select your transfer type from the options — choose Day 3 fresh transfer, Day 5 blastocyst transfer (fresh or frozen), or egg retrieval date. 2. Enter your embryo transfer date or egg retrieval date in the YYYY-MM-DD format (for example, 2026-05-18). 3. Click Calculate to instantly see your estimated due date, conception date, how many weeks pregnant you are today, your current trimester, and the number of days remaining until your due date. 4. Share or save your results for reference at your next prenatal appointment.
How IVF Due Dates Are Calculated
IVF due dates are determined differently from naturally conceived pregnancies. In a standard pregnancy, the due date is calculated by adding 280 days (40 weeks) to the first day of the last menstrual period (LMP). With IVF, the exact age of the embryo at the time of transfer is known, which allows for a more precise calculation.
Day 3 Embryo Transfer
When a Day 3 embryo is transferred, the embryo is already 3 days past fertilization (conception). Therefore, the due date is calculated by adding 263 days to the transfer date (266 days from conception minus the 3 days the embryo has already developed).
Day 5 Blastocyst Transfer
A blastocyst transfer occurs on Day 5 of embryo development. The due date is calculated by adding 261 days to the transfer date (266 days minus 5 days already elapsed).
Egg Retrieval Date
If you know only the egg retrieval date, this is treated as the day of fertilization (conception day). The due date is calculated by adding 266 days to the retrieval date.
Gestational Age vs. Fetal Age
Gestational age is counted from the last menstrual period (LMP), which is approximately 14 days before ovulation/fertilization. Fetal age (also called embryonic age) is counted from the actual day of conception. For IVF pregnancies, gestational age is calculated by adding 14 days to the fetal age.
Fresh vs. Frozen Embryo Transfers
The calculation is the same whether you had a fresh or frozen embryo transfer — what matters is the developmental stage (Day 3 or Day 5) of the embryo at the time of transfer. Both fresh and frozen transfers use the same formula.
Trimesters of Pregnancy
- 1st Trimester: Weeks 1–12 (0–84 gestational days)
- 2nd Trimester: Weeks 13–26 (85–188 gestational days)
- 3rd Trimester: Weeks 27–40+ (189+ gestational days)