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Naegele's Obstetric Rule

Pregnancy Due Date Calculator

Estimate your estimated date of delivery (EDD) and current gestational progress from the first day of your last menstrual period.

Standard average is 28 days

Select your last period date to calculate estimated due date.

Clinical due dates are estimates; only about 5% of babies are born precisely on their estimated due date.

⚕️ Educational Tool Disclaimer

This tool provides general health information only. It cannot diagnose conditions or replace a visit to a healthcare professional. The results are educational and should not be considered a medical diagnosis.