How accurate is the IVF due date calculator?

Our IVF due date calculator is highly accurate as it uses IVF-specific calculations that account for embryo development timing. Unlike traditional pregnancy calculators, it considers the exact age of the embryo at transfer, making it more precise for IVF pregnancies.

What's the difference between FET and fresh transfer due date calculations?

FET (frozen embryo transfer) and fresh transfer calculations differ based on embryo development timing. Fresh transfers typically use the retrieval date, while FET calculations use the transfer date and known embryo age. Our calculator automatically adjusts for these differences.

Can I use this calculator for day 6 embryo transfers?

Yes, our IVF due date calculator specifically supports day 6 embryo transfers. Day 6 blastocysts are transferred one day later than day 5, and our calculator accounts for this difference in embryo development timing.

Is the due date different for IVF twins?

The due date calculation method is the same for IVF twins, but twins typically deliver 2-3 weeks earlier than singletons. Our calculator provides the standard due date, and your doctor will monitor for early delivery signs with multiple pregnancies.

When should I start using pregnancy apps after IVF?

You can start using pregnancy apps after a positive beta hCG test, typically 9-14 days after transfer. Use the due date from our IVF calculator rather than the app's calculation, as most apps use last menstrual period which doesn't apply to IVF pregnancies.

IVF Due Date Calculator

Calculate your expected delivery date for IVF pregnancies including FET, fresh transfer, and day 6 embryo transfers

IVF Transfer Type Choose the type of IVF procedure you underwent

Transfer Date Enter the date of your embryo transfer

Multiple embryos transferred (twins possibility) Check if more than one embryo was transferred

Your IVF Due Date

Expected Due Date:

Current Week:

Days Remaining:

Transfer Type:

Note: With multiple embryos, delivery may occur 2-3 weeks earlier than the calculated due date. Consult your doctor for monitoring.

How IVF Due Date Calculation Works

IVF due dates are calculated differently from natural pregnancies. Instead of using the last menstrual period, we use the embryo transfer date and add the appropriate development time based on embryo age.

Day 3 Embryo: Add 266 days (38 weeks) to transfer date
Day 5 Blastocyst: Add 264 days (37 weeks 5 days) to transfer date
Day 6 Blastocyst: Add 263 days (37 weeks 4 days) to transfer date

Important Considerations

IVF due dates are typically more accurate than natural conception dates
Multiple embryos may result in earlier delivery
FET (Frozen Embryo Transfer) calculations are the same as fresh transfers
Always consult your reproductive endocrinologist for personalized care
Regular monitoring is essential throughout IVF pregnancies

Benefits of Accurate Due Date Calculation

Better pregnancy planning and preparation
Accurate scheduling of prenatal appointments
Proper timing for genetic testing if needed
Enhanced monitoring for high-risk pregnancies
Peace of mind with precise gestational age tracking

Frequently Asked Questions

How accurate are IVF due date calculations?

IVF due date calculations are typically very accurate because the exact embryo transfer date is known. Unlike natural conception where ovulation timing can vary, IVF provides precise developmental timing, making due dates accurate within 1-2 days.

Is there a difference between fresh and frozen embryo transfer due dates?

No, there is no difference in due date calculation between fresh and frozen embryo transfers. The calculation is based on the embryo's developmental stage (day 3, 5, or 6) at the time of transfer, regardless of whether it was fresh or previously frozen.

What if multiple embryos were transferred?

With multiple embryo transfers, there's a higher chance of twins or multiples. While the due date calculation remains the same, multiple pregnancies often deliver 2-3 weeks earlier than singleton pregnancies. Your doctor will monitor you more closely.

When should I start prenatal care after IVF?

Most IVF patients have their first ultrasound 6-7 weeks after transfer to confirm pregnancy and heartbeat. Regular prenatal care typically begins around 8-10 weeks, transitioning from your fertility clinic to an obstetrician.

Can the due date change during pregnancy?

IVF due dates rarely change because the transfer date provides an exact reference point. However, early ultrasound measurements may occasionally suggest minor adjustments. Your healthcare provider will determine if any changes are necessary.