IVF Pregnancy Due Date Calculator

Calculate your estimated due date and track your pregnancy progress after IVF treatment. This tool helps you understand key milestones based on your embryo transfer date and type.

IVF Procedure Details

Embryo Transfer Date

Embryo Stage at Transfer

3-Day Embryo 5-Day Blastocyst 6-Day Blastocyst

IVF Cycle Type

Medicated Cycle Natural Cycle

Personal Notes (Optional)

Pregnancy Results

Estimated Due Date
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Based on IVF transfer date

Gestational Age

Weeks + Days from conception

Current Trimester

1st Trimester

2nd Trimester

3rd Trimester

Pregnancy Timeline

Pregnancy Progress

Trimester Breakdown

Understanding IVF Pregnancy Dating

IVF pregnancy dating differs from natural conception because the exact date of embryo development is known. While a typical pregnancy is calculated as 40 weeks from the first day of your last menstrual period (LMP), IVF pregnancies are dated from the embryo transfer date and the embryo's stage of development.

How IVF Due Dates Are Calculated

For IVF pregnancies, the due date is calculated by adding 266 days (38 weeks) to the date of conception (fertilization). Since we know exactly when the embryo was transferred and its developmental stage, we can accurately determine the conception date:

3-day embryo: Conception occurred 3 days before transfer
5-day blastocyst: Conception occurred 5 days before transfer
6-day blastocyst: Conception occurred 6 days before transfer

The due date is then calculated as: Transfer date + 266 days - Embryo age. This results in a due date that's approximately 38 weeks from conception or 40 weeks from the theoretical LMP.

Gestational Age in IVF Pregnancies

Gestational age in IVF pregnancies starts from the first day of your last menstrual period, not from the transfer date. This means that at the time of a 5-day embryo transfer, you're already considered approximately 2 weeks and 5 days pregnant. This standardized approach allows healthcare providers to compare IVF pregnancies with naturally conceived pregnancies.

Trimester Breakdown

Pregnancy is divided into three trimesters, each with important developmental milestones:

First Trimester (Weeks 1-13)

This period includes embryo implantation, major organ development, and the highest risk of miscarriage. Morning sickness and fatigue are common symptoms.

Second Trimester (Weeks 14-27)

Often called the "honeymoon period" of pregnancy, when morning sickness usually subsides. The fetus grows rapidly, and you'll likely feel the first movements.

Third Trimester (Weeks 28-40+)

The final stage of pregnancy where the fetus gains weight and prepares for birth. Common symptoms include back pain, frequent urination, and Braxton Hicks contractions.

Frequently Asked Questions

How accurate are IVF due dates compared to natural conception?

IVF due dates are more accurate than those calculated from LMP in natural pregnancies because we know the exact date of conception. However, only about 5% of babies are born on their exact due date, with most arriving between 37 and 42 weeks.

Does the type of IVF cycle affect the due date calculation?

For medicated cycles, the standard calculation applies. For natural cycles, some providers may adjust slightly if ovulation occurred later than day 14 of your cycle, but most use the same calculation for consistency.

What if I had a frozen embryo transfer (FET)?

The calculation is the same whether the embryo was fresh or frozen. What matters is the embryo's developmental stage (3-day, 5-day, etc.) at the time of transfer.

Will my doctor use this same due date?

Most reproductive endocrinologists and obstetricians use the IVF-specific calculation. Your due date may be confirmed or adjusted slightly during your dating ultrasound, but IVF calculations are typically very accurate.

How does twin pregnancy affect the due date?

The due date calculation remains the same for multiples, but twins and triplets often arrive earlier. About 60% of twins are born before 37 weeks, so your doctor will monitor you more closely in the third trimester.

Disclaimer: This IVF Pregnancy Due Date Calculator provides estimates based on standard medical guidelines for IVF pregnancies. The results should not be considered medical advice. Always consult with your healthcare provider for accurate pregnancy dating and prenatal care. Individual factors may affect your actual due date, which may be adjusted by your doctor based on ultrasound measurements and other clinical factors.