EDD Calculation Formula:
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The Pregnancy Due Date Calculator estimates your expected delivery date (EDD) based on your current pregnancy week. It uses the standard 40-week pregnancy duration to calculate when your baby is likely to arrive.
The calculator uses the following formula:
Where:
Explanation: The formula calculates how many days remain until the 40-week mark and adds those days to the current date to determine the estimated due date.
Details: Accurate due date estimation is crucial for prenatal care planning, monitoring fetal development, preparing for delivery, and ensuring both mother and baby receive appropriate medical attention throughout the pregnancy.
Tips: Enter the current date and your current pregnancy week (0-40 weeks). The calculator will instantly compute your estimated due date and show how many days remain until your due date.
Q1: How accurate is this due date calculation?
A: This calculation provides an estimate based on the standard 40-week pregnancy. Actual delivery dates can vary by ±2 weeks from the estimated due date.
Q2: What if I don't know my exact current week?
A: Use your best estimate or consult with your healthcare provider for a more accurate assessment through ultrasound dating.
Q3: Why is pregnancy calculated as 40 weeks?
A: Pregnancy is typically calculated as 40 weeks from the first day of your last menstrual period (LMP), which includes about 2 weeks before conception actually occurs.
Q4: Can due dates change during pregnancy?
A: Yes, healthcare providers may adjust due dates based on ultrasound measurements, especially if there's a significant difference from LMP-based calculations.
Q5: What percentage of babies are born on their due date?
A: Only about 5% of babies are born exactly on their due date. Most births occur within two weeks before or after the estimated due date.