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A 20-year-old female asked:

when i count back 40weeks from my due date which is november 22nd i get february 22nd so is that the correct date of when sexual intercourse occurred?

1 doctor answer1 doctor weighed in
Dr. Wendy Askew
Obstetrics and Gynecology 24 years experience
Maybe, but: Counting back 40 weeks should put you at the first day of your last menstrual period - that's when the counting is started, because it's the only (usually) reliable 'marker' or sign your doctor would have (because days of intercourse will vary for most patients, and be hard to remember) but most patients will be able to recall whentheir period occurred, and then the day of ovulation/expected concp.

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Last updated May 18, 2013

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