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Pregnancy Calculator

This pregnancy calculator estimates your baby's due date based on your last menstrual period. Remember, the due date is only an estimate and you should always consult with your doctor. Only about 1 in 20 births occur on the predicted due date (that's just 5%), so for most women (95%), there will be a margin of error of a few weeks on either side of the due date.

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Due Date Based on Last Menstrual Period (LMP)