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Beverly, NJ
A 24-year-old female asked:

How accurate is a ultra sound for the fetal age in early pregnancy?

1 doctor answer2 doctors weighed in
Dr. Felecia Sumner
Family Medicine 12 years experience
Depends: Ultrasound are very accurate particularly in the 1st trimester, and are often only 1-2 days off, if at all, from the estimated due date. The later along in pregnancy you get your ultrasound done, however, the less accurate the dating will be. Congrats on your pregnancy and best wishes!
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Last updated Jul 16, 2014


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