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A 32-year-old female asked:

If 1st trimester u/s are off by a week, than would this mean fetus gest age would be off? would fetus be 11 or 13 weeks then when it measured 62mm?

1 doctor answer1 doctor weighed in
Dr. Liza Kunz
Maternal-Fetal Medicine 23 years experience
62 mm CRL: A 62 mm crown rump length corresponds to about 12 weeks 4 days. Hope that helps!
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Last updated Mar 14, 2013


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