A member asked:

From personal opinion have you ever seen early ultrasound off by a week?

2 doctors weighed in across 2 answers

If you mean a: Pregnancy ultrasound, yes -- that's very common. Don't worry about it. Talk w/your doctor.

Answered 8/12/2013

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Dr. Bruce J. Stringer answered

Specializes in Radiology

Unusual: If you are asking about OB ultrasounds before 10 weeks menstrual age, i would have to say that being a week off is more than i would expect for a properly done study. The differences in size and appearance at this stage changes almost by the day. Being a week off expected dates would suggest to me that the estimate of the conception date was off.

Answered 6/10/2014

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