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Pregnancy

Due Date Calculator.

Estimate your pregnancy due date based on your last menstrual period or conception date.

About Due Date Calculation.

A pregnancy due date is estimated at 40 weeks (280 days) from the first day of your last menstrual period (LMP). Conception typically occurs about 2 weeks after LMP. Only about 5% of babies arrive exactly on their due date — it's an estimate, not a guarantee. This calculator uses the standard Naegele's rule: LMP + 280 days = estimated due date.

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