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EDD And Conception Formula:
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The EDD (Estimated Due Date) and Conception Calculator helps determine the expected delivery date based on the known conception date. It uses the standard calculation of adding 266 days to the conception date to estimate when the baby will be born.
The calculator uses the following formula:
Where:
Explanation: This calculation assumes a standard 266-day gestation period from conception to birth, which corresponds to approximately 38 weeks of pregnancy.
Details: Accurate pregnancy dating is crucial for proper prenatal care, monitoring fetal development, scheduling important tests, and preparing for delivery. It helps healthcare providers track the baby's growth and development milestones.
Tips: Enter the known conception date in the date picker. The calculator will automatically compute and display the estimated due date. Make sure to use the actual conception date for most accurate results.
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 estimate. Actual delivery dates can vary by ±2 weeks from the calculated due date, as 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 you know your last menstrual period (LMP), you can calculate using LMP + 280 days, or use ultrasound dating which is often more accurate in early pregnancy.
Q4: Does this work for IVF pregnancies?
A: For IVF pregnancies, the conception date is precisely known, making this calculation very accurate. Use the embryo transfer date as the conception date.
Q5: What factors can affect the actual delivery date?
A: Maternal health, fetal development, multiple pregnancies, and individual variations in gestation length can all influence the actual delivery date.