MEDICALPregnancyHealth Calculator
🔬

IVF Due Date Calculator

Calculate your expected due date after IVF using embryo transfer date. For Day 3 transfers, add 263 days; for Day 5 (blastocyst) transfers, add 261 days from transfer date.

Concept Fundamentals
+263 Days
Day 3 Transfer
+261 Days
Day 5 Transfer
37-42 Wks
IVF Term

Did our AI summary help? Let us know.

Key values and context for this tool: • Day 3 Transfer: +263 Days • Day 5 Transfer: +261 Days • IVF Term: 37-42 Wks

Key values
+263 Days
Day 3 Transfer
Key value
+261 Days
Day 5 Transfer
Key value
37-42 Wks
IVF Term
Key value

Ready to run the numbers?

Why: Day 3 +263 days, Day 5 +261 days.

How: Enter your values in the calculator fields below, keep units consistent, then run the calculation to see results and any step-by-step work shown on this page.

Run the calculator when you are ready.

Calculate Your HealthUse the calculator below to check your health metrics

📋 Quick Examples — Click to Load

Please enter your embryo transfer date.
Please enter your embryo transfer date.

For informational purposes only — not medical advice. Consult a healthcare professional before acting on results.

Calculate your expected due date after IVF using embryo transfer date. For Day 3 transfers, add 263 days; for Day 5 (blastocyst) transfers, add 261 days. IVF provides the most precise due date because the transfer date is known exactly. Full term is 37-42 weeks.

+263 Days
Day 3 Transfer
+261 Days
Day 5 Transfer
37-42 Wks
IVF Term
Exact
Accuracy

Sources: ASRM, SART, ACOG, WHO.

Key Takeaways

  • • Day 5 blastocyst: Transfer + 261 days = EDD
  • • Day 3 cleavage: Transfer + 263 days = EDD
  • • Day 6 expanded: Transfer + 260 days = EDD
  • • Fresh and frozen use the same formula

Did You Know?

🔬 IVF due dates are most accurate—transfer date is known exactly
📅 Equivalent LMP = Transfer - (Embryo Day + 14) for medical records
💉 First beta hCG: Day 5 transfer ~9 days post-transfer
🏥 RE graduation typically 10-12 weeks after transfer
❄️ Fresh vs frozen: same due date calculation
📊 Day 5 blastocyst transfers have higher success rates than Day 3

How Does IVF Due Date Work?

Formula

EDD = Transfer Date + (266 - Embryo Day). 266 days is pregnancy length from conception. Embryo age at transfer is subtracted.

Equivalent LMP

LMP = Transfer - (Embryo Day + 14). Converts to standard obstetric dating for OB providers.

IVF Milestones

Beta hCG ~9-11 days post-transfer, first ultrasound ~6 weeks, RE graduation ~10-12 weeks.

Expert Tips

Provide your equivalent LMP date to OB providers for consistent medical records.
Don't change your IVF-calculated due date based on later ultrasounds.
Track beta hCG dates and first ultrasound for your records.
Discuss RE-to-OB transition timing with your fertility clinic.

Transfer Type Comparison

Embryo StageDays to AddNotes
Day 3 (Cleavage)2636-8 cells
Day 5 (Blastocyst)261~100 cells, most common
Day 6 (Expanded)260Extended culture

Frequently Asked Questions

How is IVF due date calculated?

IVF due date = transfer date + days based on embryo age. Day 3 (cleavage) adds 263 days; Day 5 (blastocyst) adds 261 days; Day 6 adds 260 days. This accounts for the embryo's age at transfer to align with standard gestational dating.

Why is Day 5 transfer different from Day 3?

Day 5 blastocysts are 5 days old at transfer, so we add 261 days to reach 40 weeks from LMP. Day 3 embryos are 3 days old, so we add 263 days. The formula is: 266 (days from conception to term) minus embryo age.

Does fresh vs frozen transfer affect due date?

No. The calculation is identical for fresh and frozen embryo transfers. What matters is the embryo's age at transfer (Day 3, 5, or 6), not whether it was fresh or previously frozen.

When do I graduate from my RE to an OB?

Most reproductive endocrinologists transfer care to an OB around 10-12 weeks after confirming a viable pregnancy with good heartbeat and growth. Some clinics may release earlier or later based on protocol.

What is the equivalent LMP date for IVF?

Equivalent LMP = Transfer Date - (Embryo Day + 14). This converts IVF dates to standard LMP-based gestational age for medical records and allows OB providers to use familiar dating.

How accurate is IVF due date?

IVF provides the most accurate due date because the transfer date is known exactly. There is no uncertainty about ovulation timing. Accuracy is typically within 1-2 days.

Key Statistics

263
Day 3 (days)
261
Day 5 (days)
260
Day 6 (days)
37-42
Term (wks)

Official Data Sources

ASRM ↗
American Society for Reproductive Medicine
SART ↗
Society for Assisted Reproductive Technology
ACOG ↗
Obstetric guidelines for IVF pregnancy
WHO ↗
International fertility standards

⚠️ Disclaimer: This calculator is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your reproductive endocrinologist and OB for IVF pregnancy care.

👈 START HERE
⬅️Jump in and explore the concept!
AI

Related Calculators

EDD Calculator

Estimate delivery date using multiple methods including LMP, ultrasound, and IVF calculations

Health

Conception Calculator

Estimate conception date from due date or birth date with fertile window calculation

Health

Crown-Rump Length Calculator

Estimate gestational age from CRL ultrasound measurement using validated formulas

Health

Due Date Calculator

Calculate expected delivery date based on last menstrual period or conception date using Naegele's rule

Health

Gestational Age Calculator

Calculate current gestational age in weeks and days with fetal development milestones

Health

Mean Sac Diameter Calculator

Calculate gestational age from gestational sac measurements in early pregnancy

Health