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A member asked:
Can a first trimester ultrasound be 19 days off?
3 doctors weighed in across 2 answers
No: A difference of 7 days should cause your pregnancy to be re-dated.
Answered 3/15/2013
5.2k views
Thank
Not likely: Measurements during the first trimester are usually accurate to +/- 7 days, and are established from the first day of bleeding from your last menstrual cycle . As the pregnancy progresses the dating becomes less accurate.
Answered 12/20/2014
5.2k views
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