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Pregnancy Due Date Calculator

The standard due date estimate adds 280 days (40 weeks) to the first day of your last menstrual period. This is the same method most doctors use for the first estimate, later confirmed by ultrasound.

\u2014Estimated due date

How to use

  1. Enter the first day of your last menstrual period.
  2. Click Calculate to see your estimated due date.
  3. Remember this is an estimate — only about 5 percent of babies arrive on it.

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