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A 21-year-old female asked:

Can ultrasounds be off when it comes to determining fetus age in the end of 1st trimester?

1 doctor answer3 doctors weighed in
Dr. Phillip Goebel
Emergency Medicine 18 years experience
Accurate: Ultrasounds are reasonably accurate at the end of the first trimester with margin of error of several days.
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Last updated Aug 11, 2014


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