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A member asked:
Doctor said that a 12 week fetus couldn't be 2 weeks off and confused with an 8 or 10 week fetus.is there not a range of error with ultrasounds?
3 doctors weighed in across 2 answers
7 days: Two weeks is outside the margin of error of ultrasound at this gestation. I agree with your doctor.
Answered 10/24/2017
5.3k views
You are mostly right: You can ask to see the ultrasound study itself. Each measurement carries with it an error measurement, calculated on the machine itself and usually saved as one of the last images in the scan. Your doctor may also be right however; the sum of the information and clinical data may be more specific for dates. The earlier the ultrasound, the more accurate. At 5 weeks, tv error is just a few days.
Answered 12/9/2013
5.2k views
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