Due Date Calculation?

Specialties Ob/Gyn

Published

My last period started Mar 8th (I have a 30-day cycle, 30 days between the first day of my period and the first day of the next) it was a few days late. We spent the last week of Mar and first week of April on vacation, so I was figuring my period would be late due to the excitement (my cycle is very sensitive to changes). We stopped using birth control (spermacidal jelly) on the 10th of April (technically I should have been menstruating just before or around that time, but I wasn't). I just went to see my doctor today (Apr. 19th) and had a positive pregnancy test! So how do I figure my due date since my cycle was off this month?

Thanks! :)

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Specializes in Maternal - Child Health.

Congratulations!

The standard calculation of your due date is to start with the first day of your last period and count back 3 months, then add 1 week.

So, from March 8, you count back to December 8, then add a week to make your EDC December 15.

There are variations in every woman 's cycle, and most OB's do not make corrections for them.

Good luck, and have a happy, healthy pregnancy!

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Hey, congratulations!

Love

Dennie

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Specializes in Community Health Nurse.

Ahhhh, congrats to you and your hubby, Julie! :kisses

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