How to Calculate a Due Date After IVF

One of the first questions asked of a pregnant woman is, "When are you due?" No matter how you got pregnant, it's not quite as simple as adding nine months to the day of conception, even though with in vitro fertilization (IVF), you often know the exact date of when your child was conceived.

Things You'll Need

  • 2-year calendar
  • Date of last menstrual period or egg collection

Instructions

    • 1

      Remember whether you conceived during a natural or stimulated cycle. IVF can be implemented during natural or stimulated cycles.

    • 2

      Subtract three months from the date of your last period, then add one week. That will calculate the due date if your IVF was done during your natural cycle. For example, if your last period was February 1, subtract three months to get to November 1. Then add one week to get to November 8. That's your due date.

    • 3

      Consider yourself two weeks pregnant at the date of egg collection (the day your eggs were removed for fertilization). Then add 38 weeks using your two-year calendar. If your egg collection date was June 15, for example, your due date would be March 8.

    • 4

      Use your egg transfer (the day your fertilized eggs were placed in the uterus). For a three-day transfer, subtract 12 days and add nine months. For example, for a transfer on April 22, subtract 12 days to get April 10. Then add nine months to get January 10. For a five-day transfer, subtract 14 days and add nine months. So the due date for an April 22 five-day transfer would be January 8.

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