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A 32-year-old female asked:

Can a 12 week fetus be confused with an 11 or 13 week old fetus? (crl 62mm)

1 doctor answer1 doctor weighed in
Dr. Ron Eaker
Specializes in Obstetrics and Gynecology
Yes: The accuracy of a sonogram at this early stage is usually plus or minus a week so depending on the quality of the quality of the sonogram dates can very about 1 week or another.

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Last updated Mar 26, 2013

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