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A member asked:
Vaginal ultrasound measured 7 wks 6 days on june 22, first day of lm april 26 how accurate is that,what is the inaccurate time frame.pregnancy in may?
A doctor has provided 1 answer
The margin of: error for ultrasound is roughly +/- 8%(in days) throughout the pregnancy. So at 55 days, it would be about +/- 4 1/2 days.
Answered 8/27/2015
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