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A 20-year-old female asked:

Iwent tothe doctor on september24 had a transvaginal ultrasound done.they determined i was9w4d. so about a 10-11w gestational period.how off can thy b?

1 doctor answer1 doctor weighed in
Dr. Dennis Higginbotham
American Board of Obstetrics and Gynecology 31 years experience
+/- about 7 days: An ultrasound at 9 weeks 4 days is generally going to be accurate to within about 7 days. So that person should be between 8 weeks 4 days and 10 weeks 4 days.
Last updated Oct 3, 2013

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