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A member asked:
Is a six week sonogram accurate to plus or minus four days or plus or minus fourteen days?
4 doctors weighed in across 3 answers
4 days: Ultrasounds very early like this are quite accurate. The date determined by this early us is usually right on.
Answered 7/22/2013
5k views
6 week sonogram: A 6 week ultrasound should be very accurate, so answering your question, 4 days and not 14 days.
Answered 5/1/2015
5k views
Ultrasound +/- 8%: Properly performed and interpreted ultrasound examinations have a variability of 8% plus or minus the measured dating. Ultrasound dating at 6 weeks 0 days should have a 95% confidence range of 5 weeks 4 days to 6 weeks 3 days which is +/- 8%.
Answered 8/30/2015
5k views
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