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A member asked:
How accurate is an abdominal ultrasound at 7 weeks pregnant? can it be off by 2+ weeks?
3 doctors weighed in across 2 answers
Yes: Ultrasound exams have a 'fudge factor' of plus or minus two weeks.
Answered 7/24/2013
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Show 1 more comment
Very accurate: Ultrasound is very accurate during early pregnancy for dating. Less than 7 weeks, a transvaginal/endovaginal exam might be performed for better detail.
Answered 7/29/2013
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