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A member asked:
Is it normal to have variations between different ultrasound machines? 1 ultrasound tech measured twins at 1 & 2 days ahead then few days later another ultrasound tech at another practice said 1 & 2 days behind. strong heart beats. both say normal?
A doctor has provided 1 answer
Sonograms : All sonograms have technical margin of errors. This is part of the technology. The further along in pregnancy the larger the margin of error. A 1-2 day difference is considered normal.
Answered 1/23/2021
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