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

Dr. Jeff Livingston answered

Specializes in Obstetrics and Gynecology

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.

Dr Kuitems agreed

Answered 1/23/2021

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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

Dr. Jeff Livingston answered

Dr Kuitems agreed

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