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Due Date Calculation Formula:
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The Due Date Calculator estimates the expected delivery date based on current pregnancy duration in weeks and days. It helps expectant parents and healthcare providers plan for the arrival of the baby.
The calculator uses the due date calculation formula:
Where:
Explanation: The formula calculates the remaining time until the full 40-week term by subtracting current pregnancy duration from 40 weeks and converting to days.
Details: Accurate due date estimation is crucial for prenatal care planning, monitoring fetal development, preparing for delivery, and ensuring timely medical interventions when needed.
Tips: Enter the current date, number of weeks pregnant (0-40), and additional days (0-6). The calculator will compute your estimated due date based on a standard 40-week pregnancy.
Q1: How accurate is this due date calculation?
A: This calculation provides an estimate based on standard 40-week pregnancy. Actual delivery dates may vary by ±2 weeks from the estimated date.
Q2: What if I know my conception date?
A: If you know your conception date, you can calculate due date by adding 266 days (38 weeks) to the conception date.
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, which includes about 2 weeks before actual conception.
Q4: Can due dates change during pregnancy?
A: Yes, healthcare providers may adjust due dates based on ultrasound measurements, especially if early ultrasound differs significantly from LMP-based calculation.
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.