IVF Due Date Formula:
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The IVF Due Date Calculator estimates the expected delivery date for pregnancies achieved through in vitro fertilization. It uses the embryo transfer date plus 266 days to calculate the estimated due date, providing accurate pregnancy dating for IVF patients.
The calculator uses the standard IVF due date formula:
Where:
Explanation: The 266-day calculation accounts for the precise timing of embryo development from transfer, providing more accurate dating than traditional last menstrual period calculations.
Details: Accurate due date calculation is crucial for monitoring fetal development, scheduling prenatal appointments, planning for delivery, and ensuring proper prenatal care throughout the pregnancy journey.
Tips: Enter the exact date of your embryo transfer procedure. The calculator will automatically compute your estimated due date by adding 266 days to the transfer date.
Q1: Why 266 days instead of 280 days?
A: Traditional pregnancy calculations use 280 days from the last menstrual period. IVF calculations use 266 days from embryo transfer because the embryo development timeline is precisely known.
Q2: Does this work for all types of IVF transfers?
A: This calculation works for both fresh and frozen embryo transfers. The key factor is the actual transfer date regardless of embryo type or freezing status.
Q3: What if I had a day 3 vs day 5 embryo transfer?
A: The 266-day calculation is standard for all embryo transfers. The embryo age at transfer is already accounted for in the standard IVF due date calculation method.
Q4: How accurate is the IVF due date calculation?
A: IVF due dates are typically more accurate than traditional calculations since the conception date is precisely known. However, actual delivery dates may vary by ±2 weeks.
Q5: Should I share this due date with my healthcare provider?
A: Yes, always share your calculated IVF due date with your obstetrician to ensure consistent dating throughout your prenatal care.