How does the IVF Pregnancy Calculator work?

Unlike natural conception calculators that use the Last Menstrual Period (LMP), an IVF Pregnancy Calculator starts from the exact date of egg retrieval or embryo transfer. For a 5-day transfer, the due date is calculated by adding 261 days to the transfer date.

Is an IVF due date more accurate?

Yes. Because the exact moment of fertilization (or transfer) is known medically, results from an IVF Pregnancy Calculator are often more precise than those calculated from a natural LMP, which relies on estimated ovulation.

When can I take a pregnancy test after IVF?

Clinics usually schedule a Beta hCG blood test around 9 to 14 days after transfer (depending on whether it was a Day 3 or Day 5 transfer). Home tests may show positive a few days earlier, but can be influenced by trigger shots.

IVF Pregnancy Calculator | Transfer, Retrieval IUI Due Date

IVF Pregnancy Calculator | Transfer, Retrieval & IUI Due Date

Precision Fertility

Advanced
IVF Pregnancy Calculator

Using a specialized IVF Pregnancy Calculator is essential for accuracy in assisted reproduction. Whether you had a 3-Day Transfer, 5-Day Blastocyst Transfer, or IUI, our tool calculates your exact due date and current gestational age.

Calculation Methods

Embryo Transfer (IVF/FET)

Calculates based on the age of the embryo (Day 3 or Day 5 blastocyst) at transfer.
Egg Retrieval / IUI

Calculates from the day of fertilization or insemination (equivalent to ovulation).

Calculation Method

Embryo Transfer IVF / FET

Retrieval / IUI Day of Ovulation

Transfer Date

Embryo Type

Day 5 Transfer Blastocyst

Day 3 Transfer Cleavage Stage

Estimated Arrival

Your Estimated Due Date

—

Current Status

— Weeks — Days

Pregnant

🤰

Key Milestones

Week 4

Beta hCG Test Blood pregnancy test

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Week 6

First Ultrasound Heartbeat check

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Week 12

End of Trimester 1 Risk decreases significantly

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IVF Specific Logic

Why use an IVF Pregnancy Calculator?

Standard due date calculators assume conception happens 14 days after your period. IVF is different—we know the exact moment life began.

Embryo Age Adjusted

We automatically adjust for 3-Day or 5-Day transfers to ensure your due date is medically accurate.

Milestone Planning

Know exactly when to expect your Beta blood test and first viability scan.

Real-Time Age

Calculate exactly how many weeks and days pregnant you are today (PUPO status included).

Easy Steps

How It Works

Choose Type

Select “Embryo Transfer” for IVF/FET or “Retrieval/IUI” depending on your procedure.

Select Embryo Age

If you chose transfer, specify if it was a Day 3 or Day 5 embryo. This shifts the calculation by 2 days.

Enter Date

Input the date the procedure took place to generate your timeline instantly.

The 2WW Timeline

Transfer Day Embryo enters uterus (2w5d pregnant)

Implantation Days 1-5 Post Transfer

Beta hCG Test 9-14 Days Post Transfer

Frequently Asked Questions

Why is IVF due date calculation different?

Natural pregnancy dating assumes ovulation happens on Day 14 of a 28-day cycle. In IVF, we know the exact date of fertilization. We adjust the “Last Menstrual Period” date mathematically to align with the embryo’s actual age, ensuring higher accuracy.

How do you calculate for Frozen Embryo Transfer (FET)?

For FET, the calculation is identical to a fresh transfer. It depends solely on the age of the embryo when it was frozen (usually Day 3 or Day 5). The date of transfer becomes the reference point.

What does “2w5d” mean?

It means “2 Weeks and 5 Days Pregnant.” On the day of a 5-Day transfer, you are clinically considered 2 weeks and 5 days pregnant, because pregnancy dating conventionally starts 2 weeks before ovulation.

Advanced IVF Pregnancy Calculator