IVF DUE DATE CALCULATOR
Just had your embryo transfer? Get your IVF due date in seconds — free, private, and accurate. Enter your transfer date below, then scroll for guides, other tools, and FAQs.
IVF Due Date Calculator — Get Your Due Date Instantly
Enter your embryo transfer date and select Day 3 or Day 5. No sign-up. No data stored.
IVF Due Date Calculator
Your personalized fertility journey companion
Calculate Your Due Date
Quick answer: Add 263 days to your transfer date for a Day 3 embryo, or 261 days for a Day 5 blastocyst. Example: transfer on March 1 (Day 5) → due date around November 17.
IVF Due Date: The Basics You Need to Know
Quick, plain-English facts every IVF parent should know before using the calculator above.
🧮 Simple formula: Due date = transfer date + 263 days (Day 3) or 261 days (Day 5 blastocyst).
❄️ Frozen vs fresh: Doesn’t change the math. Only the embryo’s biological age at transfer matters.
📅 You’re already “2 weeks pregnant” on transfer day — obstetric dating counts from your last period, not fertilization.
🩺 First ultrasound: usually 3–5 weeks after transfer (around 6–7 weeks) to confirm the heartbeat.
📊 IVF vs natural due dates: IVF is more precise because fertilization and transfer dates are documented.
🎯 Accuracy: Due dates are estimates. Babies arrive anywhere in a 38–42 week window — not a fixed appointment.
⚖️ What affects delivery timing: multiples, maternal health conditions (gestational diabetes, high BP), baby’s growth, and prenatal care can all shift the birth date.
👶 Multiples: Twin pregnancies are often delivered around 37–38 weeks — the due date math stays the same, but the target is earlier.
Example: Transfer on March 1 with a Day 5 blastocyst → due date around November 17.
Want the full breakdown — week-by-week milestones, transfer types, beta hCG timeline, and more?
More Free IVF & Fertility Calculators
Every tool is free, mobile-friendly, and works instantly in your browser — no sign-up, no data stored.
Embryo Transfer Due Date Calculator
Detailed timeline for your specific transfer type — fresh, frozen, Day 3, Day 5, or Day 6 blastocyst.
Frozen Embryo Transfer (FET) Due Date Calculator
Purpose-built for FET patients. Calculate your due date and gestational age from a frozen embryo transfer date.
Early Pregnancy Test Calculator
Wondering when to test after your IVF transfer? See the best day for a home test and your expected hCG timeline.
Pregnancy Due Date Calculator
Estimate your baby’s due date based on your last menstrual period or conception date — works for natural conception too.
Baby Due Date Calculator
Quickly find your baby’s estimated arrival date and track your pregnancy week by week.
Baby Due Date Calculator (IVF)
A complete IVF-specific calculator covering the full journey from transfer to birth milestone planning.
Ovulation Calculator & Fertile Window Tracker
Estimate your most fertile days and understand your ovulation window — useful for planning and monitoring your cycle.
IVF Due Date Guides & Resources
Plain-English guides written for IVF parents — so you understand your pregnancy timeline, not just the number.
How to Calculate Your Due Date with IVF
The exact formula explained: 263 days for a Day 3 transfer, 261 days for a Day 5 blastocyst — with clear examples.
Using an IVF Due Date Calculator: What to Expect
What the results mean, how to read your gestational age, and how to share your timeline with your fertility clinic.
IVF Transfer Due Date: How Your Transfer Date Shapes Your Timeline
Why Day 5 blastocyst transfers are most common, and how the embryo stage shifts your due date by a couple of days.
Not Sure Where to Start?
Pick the situation that matches you right now, and we’ll take you straight to the right tool or guide.
About Us & Our Team
Built by people who understand the IVF journey. Learn who we are and why we made these tools.
About Us
Why we built a calculator specifically for IVF parents instead of adapting a natural-conception tool.
Our Team
Meet the people who research, write, and maintain our IVF tools and guides.
Contact Us
Questions, corrections, or feedback? We read every message and usually reply within a couple of days.
Frequently Asked Questions About IVF Due Dates
Quick answers to the questions IVF parents ask most often.
How is an IVF due date calculated?
Add 263 days to your transfer date for a Day 3 embryo, or 261 days for a Day 5 blastocyst. The formula is: Due Date = Transfer Date + (266 − Embryo Age at Transfer). Use the IVF Due Date Calculator at the top of this page to do it automatically.
Is a Day 3 or Day 5 transfer more accurate for due date calculation?
Both are accurate when you select the correct embryo stage. Day 5 blastocyst transfers are the most common in modern IVF clinics. Choosing the wrong stage shifts your due date by about 2 days. See the full comparison in our IVF transfer due date guide.
Does a frozen embryo transfer change my due date?
No. The due date formula is identical for fresh and frozen transfers — only the embryo’s biological age at transfer matters. A frozen Day 5 blastocyst still counts as 5 days old. Use our Frozen Embryo Transfer Due Date Calculator for FET-specific milestones.
Why am I already “2 weeks pregnant” on transfer day?
Obstetric medicine counts gestational age from your last menstrual period, not fertilization. For a Day 5 transfer, you are considered approximately 2 weeks and 5 days pregnant at the moment of transfer. This is standard practice worldwide and not a mistake in the calculator.
When is my first ultrasound after IVF?
Usually 3 to 5 weeks after transfer (around 6–7 weeks of gestational age). This is when the fetal heartbeat is typically first detectable. See the full timeline in our due date calculation guide.
Are IVF due dates more accurate than natural pregnancy due dates?
Yes — generally more precise, because the exact fertilization and transfer dates are known. But they are still estimates within a natural birth window of 38–42 weeks. Most babies are not born on their exact due date.
What factors can affect when my baby is actually born?
Multiple pregnancies, maternal health conditions (like gestational diabetes or high blood pressure), the baby’s growth pattern, and prenatal care all influence actual delivery timing. Your OB will adjust the plan based on how your specific pregnancy progresses.
Helpful Information
Everything else you might need — site map, policies, and legal information.
Medical Disclaimer: This website and its calculators are for educational and informational purposes only and are not a substitute for personalized medical advice. Always consult your fertility clinic, OB-GYN, or qualified healthcare provider for guidance specific to your pregnancy and health situation. See our full Medical Disclaimer.
Sources & Trust: Our content follows guidance from leading reproductive health organizations including ACOG, ASRM, and the CDC. Learn more on our About Us and Our Team pages.
Privacy: All calculations happen directly in your browser. We never store or share your transfer date, embryo details, or any personal data.
Calculate Your IVF Due Date Now — Free
Enter your embryo transfer date, select your embryo stage, and get your due date, gestational age, and full milestone timeline instantly.