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Due Date Calculator

Pregnancy due date from last menstrual period

Due Date Calculator

The estimated due date (EDD) is the predicted date of a baby's birth, typically calculated as 40 weeks (280 days) from the first day of the last menstrual period (LMP) — known as Naegele's rule. The actual birth normally occurs between 37 and 42 weeks gestation. Only about 4% of babies are born on their exact due date.

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