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A member asked:
Can a 13 week ultrasound ever be mistaken for a 9 week ultrasound?
A doctor has provided 1 answer
Shouldn't happen: If i understand your question, a 13 week ultrasound of a fetus should be very different from a 9 week ultrasound. The crown-rump length of the fetal pole should be much longer, and fetal anatomy should start to be measurable and quantified. If there is a discrepancy between the date of the last menstrual period and the ultrasound dating of the fetus, the ultrasound should be more accurate.
Answered 5/8/2014
5.1k views
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