Calculating Your Estimated Due Date for Delivery

Armen Hareyan's picture

One simple and common method for calculating your delivery date is as follows:

  • Mark down the date when your last period started
  • Add seven days
  • Count back three months
  • Add a whole year


For example, if the first day of your last period was September 9, 2000, adding 7 days will make the date September 16, 2000. Counting back 3 months results in the date of June 16. Finally, adding a year yields an estimated delivery date of June 16, 2001.

The above strategy is based on the assumption that conception occurred 14 days after the start of your last menstrual period. Also, it's important to remember that no matter what 'pen and paper' calculations you use to estimate your delivery date, these methods are just that


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