1. What is the Flo IVF Due Date Calculator?

The Flo IVF Due Date Calculator estimates the expected delivery date for pregnancies achieved through in vitro fertilization (IVF). It uses the embryo transfer date and embryo age to provide a more accurate due date than traditional pregnancy calculators.

2. How Does the Calculator Work?

The calculator uses the Flo IVF formula:

Where:

• 266 days — Standard length of pregnancy from conception
• Embryo Age — Days of embryo development before transfer (typically 3 or 5 days)

Explanation: The calculation accounts for the exact age of the embryo at transfer, providing a more precise due date than last menstrual period calculations.

3. Importance of Accurate Due Date Calculation

Details: An accurate due date is crucial for proper prenatal care, monitoring fetal development, and planning delivery. IVF pregnancies benefit from precise dating based on known conception dates.

4. Using the Calculator

Tips: Enter the exact embryo transfer date and the embryo's age in days at transfer (typically 3 for day-3 embryos or 5 for day-5 blastocysts).

5. Frequently Asked Questions (FAQ)

Q1: Why is 266 days used instead of 280 days?
A: 280 days is from last menstrual period (LMP), while 266 days is from conception. IVF skips the 14-day LMP estimate.

Q2: What embryo ages are typical?
A: Most transfers use day-3 (3 days old) or day-5 (5 days old) embryos. Frozen embryos may have different ages.

Q3: Does this work for frozen embryo transfers?
A: Yes, use the actual transfer date and embryo age at freezing (not time frozen).

Q4: How accurate is this calculator?
A: Very accurate for fresh IVF cycles. Actual delivery may vary by ±2 weeks from calculated date.

Q5: Should I use LMP or IVF dating during pregnancy?
A: Always use IVF dating as it's more precise. Inform all healthcare providers your pregnancy is IVF-dated.