1. What is the IVF Due Date Calculation?

The IVF due date calculation provides a more accurate estimated delivery date for pregnancies achieved through in vitro fertilization. Unlike natural pregnancies where ovulation date is uncertain, IVF provides exact dates for embryo development and transfer.

2. How Does the Calculator Work?

The calculator uses the standard IVF due date formula:

Where:

• 266 days — Standard length of human pregnancy from conception
• Embryo Age — Days of embryo development before transfer (typically 3 for day-3 embryos or 5 for day-5 blastocysts)

Explanation: The calculation accounts for the embryo's development time before transfer, providing a more precise due date than last menstrual period calculations.

3. Importance of Accurate Due Date

Details: An accurate due date is crucial for proper prenatal care scheduling, fetal growth monitoring, and timing of important tests and procedures during pregnancy.

4. Using the Calculator

Tips: Enter the exact embryo transfer date and the embryo's age in days at transfer (typically 3 or 5 days). The calculator will provide the estimated due date.

5. Frequently Asked Questions (FAQ)

Q1: Why is the IVF due date different from LMP calculation?
A: IVF provides exact conception dates, while LMP calculations assume ovulation on day 14, which may not be accurate.

Q2: What's the difference between day-3 and day-5 embryo calculations?
A: Day-5 embryos are more developed, so you subtract 5 days instead of 3 from the 266-day pregnancy duration.

Q3: Is the IVF due date more accurate?
A: Yes, IVF due dates are typically more accurate than LMP-based calculations because we know the exact conception timeline.

Q4: What if I had a frozen embryo transfer?
A: The same calculation applies - use the transfer date and the embryo's age at freezing (usually 3 or 5 days).

Q5: Will my doctor use this exact date?
A: Most doctors will use this calculation but may adjust slightly based on ultrasound measurements in early pregnancy.