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Due Date Calculation Formula:
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The Pregnancy Due Date Calculator estimates the expected delivery date (EDD) based on current pregnancy week and date. It uses the standard 40-week pregnancy duration to calculate the remaining time until delivery.
The calculator uses the due date calculation formula:
Where:
Explanation: The formula calculates the remaining weeks of pregnancy (40 - W) and converts them to days by multiplying by 7, then adds these 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 appropriate medical interventions at the right time.
Tips: Enter the current date and the number of completed pregnancy weeks (0-40). The calculator will provide the estimated due date based on a standard 40-week pregnancy duration.
Q1: How accurate is this due date calculation?
A: This provides an estimate based on standard 40-week pregnancy. Actual delivery may vary by ±2 weeks from the calculated date.
Q2: What if I don't know my exact pregnancy week?
A: For most accurate results, use ultrasound dating or consult with your healthcare provider to determine the correct pregnancy week.
Q3: Why is pregnancy calculated as 40 weeks?
A: Pregnancy is typically calculated as 40 weeks from the first day of the last menstrual period (LMP), which is about 38 weeks from conception.
Q4: Can due dates change during pregnancy?
A: Yes, due dates may be adjusted based on ultrasound measurements, especially if there's discrepancy between LMP dating and fetal size.
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 are born within two weeks before or after the estimated date.