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EDD Calculation Formula:
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The Due Date Calculator Based On Conceived Date calculates the estimated due date (EDD) by adding 266 days to the known conception date. This method provides an accurate pregnancy timeline when the exact conception date is known.
The calculator uses the following formula:
Where:
Explanation: This calculation assumes a standard 266-day gestation period from conception to delivery, which corresponds to approximately 38 weeks of pregnancy.
Details: Accurate due date calculation is essential for proper prenatal care, monitoring fetal development, planning for delivery, and ensuring the health of both mother and baby throughout pregnancy.
Tips: Enter the exact conception date in the date picker. The calculator will automatically compute the estimated due date by adding 266 days. Ensure the conception date is accurate for the most reliable result.
Q1: Why 266 days specifically?
A: 266 days represents the average gestation period from conception to delivery, which is approximately 38 weeks or 9.5 months of pregnancy.
Q2: How accurate is this calculation method?
A: When the exact conception date is known, this method is highly accurate. However, individual variations in pregnancy length can occur.
Q3: What if I don't know my exact conception date?
A: If the conception date is unknown, use the last menstrual period (LMP) method which adds 280 days (40 weeks) to the first day of your last period.
Q4: Can pregnancy length vary?
A: Yes, normal pregnancy can range from 37 to 42 weeks. Only about 5% of babies are born on their exact due date.
Q5: When should I confirm with a healthcare provider?
A: Always confirm your due date with a healthcare provider who may adjust it based on ultrasound measurements and other clinical factors.