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EDD Calculation Formula:
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The EDD (Estimated Due Date) based on conception calculates the expected delivery date by adding 266 days to the known conception date. This method provides an accurate due date 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 38 weeks of pregnancy.
Details: Accurate due date calculation is crucial for proper prenatal care, monitoring fetal development, scheduling important tests, and preparing for delivery. It helps healthcare providers track pregnancy progress and identify any potential complications.
Tips: Enter the exact known conception date. The calculator will automatically compute the estimated due date by adding 266 days. Ensure the date format is correct and the conception date is accurately known.
Q1: Why 266 days specifically?
A: 266 days represents the average gestation period from conception to delivery, which equals 38 weeks of pregnancy.
Q2: How accurate is this method?
A: When the exact conception date is known, this method is highly accurate. However, only about 5% of babies are born exactly on their due date.
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 the due date change during pregnancy?
A: Yes, healthcare providers may adjust the due date based on ultrasound measurements, especially if there's a significant difference from the initial calculation.
Q5: What is considered full term?
A: A pregnancy is considered full term between 37 weeks and 41 weeks 6 days. Delivery during this period is generally considered optimal.