A member asked:

How to estimate your conception to delivery days?

4 doctors weighed in across 2 answers

Add 38 weeks : The due date is normally 40 weeks from the first day of the last menstrual period based upon an assumption that ovulation occurs on day 14. If one knows the date of conception the due date is actually 38 weeks from that day.

Answered 5/14/2013

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Dr. Ronald De la Pena answered

Specializes in Obstetrics and Gynecology

38 wks: Estimated day of delivery is 40 wks from lmp, and ovulation/conception is two wks closer.

Answered 9/29/2012

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