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A member asked:

How accurate is an ultrasound done at 9 weeks?

2 doctors weighed in across 2 answers

Very: For dating a pregnancy, 9 week ultrasound is quite accurate, usually within a few days.

Dr Zacharias agreed

Answered 5/4/2015

5.2k views

Thank
Dr. Nikolaos Zacharias answered

Specializes in Maternal-Fetal Medicine

+/-5-6 days.: Extremely accurate within 5-6 days on either side of the due date it determines.

Answered 12/9/2013

5.2k views

Thank

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