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EDD Ovulation Calculation:
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The EDD Ovulation Calculator estimates your due date based on your known ovulation date. This method adds 266 days to your ovulation date to determine your estimated delivery date, providing an accurate prediction for pregnancy planning.
The calculator uses the ovulation-based due date formula:
Where:
Explanation: This calculation assumes a 266-day gestation period from ovulation to delivery, which corresponds to 38 weeks of pregnancy from the actual conception date.
Details: Accurate due date calculation is essential for proper prenatal care, monitoring fetal development, planning for delivery, and ensuring both maternal and fetal health throughout pregnancy.
Tips: Enter your known ovulation date in the date field. The calculator will automatically compute your estimated due date by adding 266 days to your ovulation date.
Q1: Why 266 days from ovulation?
A: This represents the typical 38-week gestation period from actual conception (ovulation) to delivery, which is more accurate than last menstrual period calculations.
Q2: How accurate is ovulation-based due date calculation?
A: When ovulation date is known precisely, this method is highly accurate. Most women deliver within 2 weeks of their calculated due date.
Q3: What if I don't know my exact ovulation date?
A: If ovulation date is unknown, use your last menstrual period (LMP) with the standard 280-day calculation from LMP instead.
Q4: Does this work for IVF pregnancies?
A: Yes, this method is ideal for IVF pregnancies where the conception date is precisely known from embryo transfer date.
Q5: Why is there a difference between ovulation and LMP calculations?
A: LMP calculations assume a 28-day cycle with ovulation on day 14, adding 280 days. Ovulation calculation adds 266 days from actual ovulation for greater accuracy.