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A member asked:
Are ultrasounds pretty accurate with conception dates?
A doctor has provided 1 answer
Yes: Ultrasound dating is most accurate early in the pregnancy using the crown-rump length (crl) of the small fetus. The measurement can be done starting around 6 weeks. While crl can be used for dating until 12 weeks, it is most accurate during 6-8 weeks when the accepted error is only about 3 days from actual date.
Answered 10/25/2019
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