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A member asked:
If you have sex with 2 partners 14 days apart...would it be possible to rule one out based on ultrasound dating?
A doctor has provided 1 answer
Yes: That is generally true, because the ultrasound dating is accurate within 1 week or so, and because when men are 2 weeks apart, usually only one of the men will have been there close to the time when the woman was fertile and ovulating.
Answered 3/6/2014
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Related Questions
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With a my first ultrasound being done my doc said i was 14w3d based off ultrasound i didnt have periods just got off depo. How off can dating be?
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I had sex with two guys 10 days apart, one on 11 Feb, and one on 20 Feb. My due date was 12 Nov from ultrasound and 13 Nov from LMP.. Im not sure who the dad is?
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