1. What Is IVF EDD Calculation?

IVF EDD (Estimated Due Date) calculation determines the expected delivery date for pregnancies achieved through in vitro fertilization. Unlike natural pregnancies, IVF pregnancies have a precisely known conception date, allowing for highly accurate due date prediction.

2. How Does The Calculator Work?

The calculator uses the standard IVF EDD formula:

Where:

• \( Transfer Date \) — The date of embryo transfer
• \( 266 days \) — Standard gestation period from conception

Explanation: This calculation provides the most accurate due date for IVF pregnancies since the exact conception date is known.

3. Importance Of Accurate Due Date Calculation

Details: Accurate due date calculation is crucial for proper prenatal care, monitoring fetal development, scheduling important tests, and preparing for delivery.

4. Using The Calculator

Tips: Enter the exact embryo transfer date. The calculator will automatically add 266 days to determine your estimated due date.

5. Frequently Asked Questions (FAQ)

Q1: Why 266 days instead of 280 days?
A: 280 days is calculated from the last menstrual period (LMP), while 266 days is from actual conception. Since IVF provides exact conception timing, 266 days is used.

Q2: Does this work for all types of embryo transfers?
A: Yes, this calculation applies to fresh transfers, frozen transfers, and donor egg cycles where the transfer date is known.

Q3: What about day 3 vs day 5 embryo transfers?
A: The calculation remains the same regardless of embryo development stage at transfer, as the 266 days accounts for full gestation from conception.

Q4: How accurate is this calculation?
A: Very accurate - typically within ±3 days, compared to ±2 weeks for LMP-based calculations in natural pregnancies.

Q5: Should I confirm with ultrasound?
A: Yes, early pregnancy ultrasound can confirm the due date, though IVF calculations are usually very precise.