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Pregnancy Due Date Calculator:
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The EDD (Estimated Due Date) Conception Date Calculator estimates the expected delivery date based on the known conception date. It adds 266 days (38 weeks) to the conception date to determine the due date.
The calculator uses the standard pregnancy calculation formula:
Where:
Explanation: This calculation is based on the average human gestation period of 266 days (38 weeks) from conception to delivery.
Details: Accurate due date estimation is crucial for prenatal care planning, monitoring fetal development, preparing for delivery, and scheduling important medical appointments and tests throughout pregnancy.
Tips: Enter the known conception date in the date field. The calculator will automatically compute and display the estimated due date. Ensure the conception date is accurate for the most reliable result.
Q1: Why 266 days instead of 280 days?
A: 280 days is calculated from the first day of the last menstrual period (LMP), while 266 days is from the actual conception date. Conception typically occurs about 14 days after LMP.
Q2: How accurate is this calculation?
A: This provides an estimated due date. Actual delivery dates can vary by ±2 weeks from the calculated EDD, as only about 5% of women deliver exactly on their due date.
Q3: What if I don't know my exact conception date?
A: If conception date is unknown, use the LMP method (LMP + 280 days) or consult with your healthcare provider for ultrasound dating, which is often more accurate.
Q4: Does this account for leap years?
A: Yes, the calculator automatically accounts for leap years and varying month lengths in the date calculation.
Q5: When should I confirm with a healthcare provider?
A: Always confirm your due date with a healthcare professional, as they may adjust it based on ultrasound measurements and other clinical factors.