How to Calculate the Time of Conception

Once you have your positive pregnancy test, you will want to know the baby's due date. Knowing when you conceived can help you determine when the baby will be born. You can figure this out with a conception calculator.

Instructions

    • 1

      Choose "last menstrual period" if you are given calculation options.

    • 2

      Enter the first day of your last menstrual period into the "Date" field of the calculator.

    • 3

      Click the "Calculate" button. Most conception calculators will display the date ovulation occurred and the time frame when conception took place.

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