Expecting a baby through IVF brings unique excitement and questions. Knowing exactly when your little one will arrive helps you prepare, plan appointments, and track milestones with confidence.
Our IVF Due Date Calculator makes it simple. Just enter your embryo transfer details and receive an accurate estimated due date (EDD) based on ACOG/ASRM guidelines.
Try the calculator below and see your full pregnancy timeline in seconds.
IVF Due Date CalculatorMedical-Grade Accuracy
ACOG / ASRM FormulaDay 3 · Day 5 · Day 6FET & Fresh
Calculate Your Due Date
Enter your embryo transfer details below
Estimated Due Date
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Gestational Age Today—
Trimester—
Theoretical LMP—
Weeks Remaining—
Twin pregnancy note: The due date above reflects 40-week dating. Twin/multiple pregnancies typically deliver at 36–37 weeks (around —). Your specialist will guide your actual delivery plan.
Your Pregnancy Milestone Timeline
This calculator uses the ACOG/ASRM-validated formula (EDD = Transfer Date + 266 − Embryo Age in days). Results are estimates. Always confirm your due date with your fertility specialist or OB-GYN. First-trimester ultrasound (6–10 weeks) is the gold standard for confirming gestational age.
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What Is an IVF Due Date Calculator?
An IVF Due Date Calculator determines your baby’s estimated due date based on the embryo transfer date and the embryo’s developmental stage, rather than your last menstrual period (LMP).
Unlike traditional pregnancy due date calculators that use a 40-week timeline from LMP, this tool accounts for the exact age of the embryo at transfer—typically Day 3 or Day 5. It predicts your expected delivery date with high precision for both fresh and frozen embryo transfers (FET).
The calculator uses validated medical formulas to show your current gestational age, remaining weeks, and a complete milestone timeline tailored to IVF pregnancies.
How to Use the IVF Due Date Calculator
Follow these simple steps to calculate your due date:
- Enter Embryo Transfer Date — Select the exact date your embryo was transferred to the uterus.
- Choose Embryo Development Stage — Select Day 3, Day 5 (blastocyst — most common), or Day 6.
- Select Transfer Type — Choose Fresh Transfer or Frozen Transfer (FET). The tool notes that embryo age matters more than fresh vs. frozen.
- Indicate Number of Embryos — Pick Single Embryo (SET) or Two Embryos (DET).
- Click Calculate My Due Date — The tool instantly displays your estimated due date and full pregnancy calendar.
You’ll receive your EDD, gestational age today, trimester, and a detailed milestone timeline from first beta hCG test through full term. Use this information to discuss your pregnancy timeline with your fertility specialist or OB-GYN.
Why Use the IVF Due Date Calculator?
- Accurate for IVF pregnancies — It adjusts for embryo age instead of relying on LMP or conception date estimates.
- Helps with planning — Know exact weeks for ultrasounds, screenings, and important milestones like viability and anatomy scans.
- Reduces anxiety — Clear dates and a visual pregnancy calendar help you feel more in control.
- Supports both FET and fresh transfers — Works seamlessly regardless of your cycle type.
- Medical-grade formulas — Built using ACOG/ASRM standards trusted by fertility clinics.
- Free and instant — No signup needed — get your results immediately and download a PDF for your records.
Couples, partners, and healthcare professionals all benefit from this precise tool when tracking an IVF pregnancy journey.
IVF Due Date Calculation Explained: Key Concepts
Traditional due dates use Naegele’s rule (add 280 days or 40 weeks to the first day of your LMP). IVF pregnancies work differently because conception timing is known precisely.
This calculator adds 266 days (38 weeks) to the embryo transfer date, then adjusts for the embryo’s age at transfer. For a Day 5 blastocyst, it effectively counts those 5 days of development already completed outside the body.
Key variables include:
- Embryo transfer date
- Embryo stage (Day 3, Day 5, Day 6)
- Gestational age from LMP (theoretical)
Example: If you had a Day 5 blastocyst transfer on January 17, 2026, your estimated due date would fall around early October 2026. Your gestational age starts counting from the theoretical LMP (about 2 weeks before transfer) to match standard pregnancy tracking.
This method gives a more accurate pregnancy timeline than LMP-based calculators for IVF patients.
Frequently Asked Questions
Enter your embryo transfer date, select the development stage (Day 5 is most common), choose fresh or frozen transfer, and indicate the number of embryos. Click calculate to instantly see your estimated due date and full milestone timeline. Results follow ACOG/ASRM formulas.
The most accurate tools adjust for embryo age at transfer rather than LMP. This IVF Due Date Calculator uses medical-grade formulas and works for both Day 5 blastocyst and Day 3 transfers, making it ideal for FET and fresh cycles.
Very accurate because the exact transfer date and embryo age are known. While only about 5% of babies arrive on their exact EDD, the calculation gives a reliable target within a 2-week window.
Yes. Frozen embryo transfer due dates work the same way — the tool accounts for the embryo's stage regardless of whether it's fresh or frozen. Embryo age at transfer is what determines the timeline.
Add approximately 261 days (266 minus 5) to your Day 5 transfer date. The calculator handles this adjustment automatically and shows your complete pregnancy calendar with all key milestones.
The IVF Due Date Calculator takes the guesswork out of your pregnancy timeline by delivering a precise estimated due date and milestone schedule tailored to your IVF journey. Whether you’re tracking your first beta hCG test or planning for the third trimester, this tool helps you prepare with confidence.
Ready to see your baby’s due date? Use the IVF Due Date Calculator above and get instant results you can trust.
Last Update: April 2026