A 29-year-old female asked:
Is a six week sonogram accurate to plus or minus four days or plus or minus fourteen days?
3 doctor answers • 4 doctors weighed in
Dr. Holly Maesanswered
Pediatrics 37 years experience
4 days: Ultrasounds very early like this are quite accurate. The date determined by this early us is usually right on.
5k viewsReviewed >2 years ago
Dr. Pavel Conovalciucanswered
Family Medicine 24 years experience
6 week sonogram: A 6 week ultrasound should be very accurate, so answering your question, 4 days and not 14 days.
5k viewsReviewed >2 years ago
Dr. Joseph Accursoanswered
Radiology 30 years experience
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%.
5k viewsAnswered >2 years ago
Last updated Aug 30, 2015
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