EDD Conception Formula:
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EDD Conception Calc (Estimated Due Date Calculator) calculates the expected delivery date by adding 266 days to the known conception date. This method provides an accurate due date estimation when the conception date is certain.
The calculator uses the simple 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 essential for proper prenatal care, monitoring fetal development, planning for delivery, and ensuring optimal maternal and fetal health outcomes.
Tips: Enter the known conception date in the date picker. The calculator will automatically compute and display the estimated due date 266 days later.
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 does this differ from LMP calculation?
A: LMP (Last Menstrual Period) calculation adds 280 days (40 weeks), while conception dating adds 266 days (38 weeks) since conception typically occurs about 2 weeks after LMP.
Q3: Which method is more accurate?
A: Conception dating is more accurate when the exact conception date is known, as it doesn't rely on menstrual cycle regularity assumptions.
Q4: What if I don't know my conception date?
A: Use the LMP-based calculator or consult with your healthcare provider for ultrasound dating, which can provide accurate gestational age estimates.
Q5: 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 discrepancy from the initial calculation.