IVF Due Date Calculator
Welcome to the most accurate IVF due date calculator. Whether you've had a fresh transfer or are using our FET due date calculator function, you can instantly calculate your due date from IVF and get a personalized pregnancy timeline.
How to Use Our IVF Due Date Calculator
Select Your Embryo Type
Choose between Day 3, Day 5, or Day 6 embryo transfer based on your IVF protocol
Enter Transfer Date
Select the exact date your embryo was transferred
Get Your Results
Instantly receive your estimated due date and current pregnancy stage
Why Choose DueDateKit for IVF Calculations
Medically Accurate
Based on ASRM and ACOG guidelines for embryo transfer calculations
Complete Privacy
All calculations happen in your browser - we never store your data
Always Accessible
Free, no registration required, works on all devices
Multilingual Support
Available in 11 languages for global accessibility
Why Our IVF Due Date Calculator is More Accurate
Based on Known Dates
Our IVF calculator for due dates uses the exact date of your embryo transfer—a known, fixed point in time, not an estimate.
Precise Embryo Age
The calculation is fine-tuned for a 3-day, 5-day, or 6-day transfer, adjusting the timeline for ultimate accuracy.
Unmatched Accuracy
Because it's based on facts, our FET and IVF due date calculator is typically more accurate than any other method.
Understanding IVF Due Date Calculation
Unlike natural conception, IVF due dates are calculated from known fertilization dates, making them more precise.
Why IVF Dates Are Different
In IVF, we know the exact fertilization date and embryo development stage. This eliminates the guesswork involved in calculating from the last menstrual period, where ovulation timing can vary by several days.
Embryo Development Stages
Day 3 embryos are typically at the 8-cell stage, while Day 5-6 embryos have developed into blastocysts with 100+ cells. This developmental difference is precisely accounted for in our calculations.
Fresh vs Frozen Transfers
Our calculator works for both fresh and frozen embryo transfers (FET). The calculation method remains the same - what matters is the embryo age at the time of transfer.
IVF Due Date Calculation Formulas
Medical-grade calculations based on embryo age at transfer
40 weeks minus 17 days
40 weeks minus 19 days
40 weeks minus 20 days
Standard 280-day pregnancy adjusted for embryo development stage
Understanding Embryo Development in IVF
Learn about the biological stages of embryo development and why timing matters for your IVF journey.
Day 3: Early Stage Development (8-cell)
At Day 3, embryos typically consist of 6-10 cells. These early-stage embryos are still developing and have not yet formed distinct cell types. Transfer at this stage is common when embryo selection is clear or when extended culture is not recommended.
Day 5-6: Blastocyst Formation (100+ cells)
Blastocysts have developed two distinct cell types: the inner cell mass (future baby) and trophectoderm (future placenta). This advanced development stage allows for better embryo selection and typically higher implantation rates.
Fresh vs Frozen Embryo Transfers
Modern vitrification techniques allow frozen embryos to maintain excellent viability. Success rates between fresh and frozen transfers are now comparable, with FET sometimes showing advantages in certain protocols.
Why Embryo Age Matters
The embryo's developmental stage at transfer directly impacts the due date calculation. Each day of in-lab development equals one day less in the uterus, which is why our calculator adjusts precisely based on your embryo age.
Frequently Asked Questions
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