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Pregnancy Calculator

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Pregnancy Calculator

Calculate your trimester and due dates

Are you unsure about your due date?

This method of calculation is only valid if:

  1. your menstrual cycles are spontaneous and not recently induced by oral contraceptives;
  2. your cycles are close to being 28 days apart (from day 1 to day 1).

Otherwise, other dating methods may be needed to calculate a due date (talk with your healthcare provider).

Enter your information in the pregnancy calculator below to get an approximate due date, then check with your doctor.

Please enter the first day of your last menstrual period.

Last Period Date:
End of First Trimester:
End of Second Trimester:
Estimated Due Date: