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A member asked:
How many days out can a 13 week ultrasound be? baby crl measured 65.6mm. could it be out by more than 10 days?
A doctor has provided 1 answer
Yes: Ultrasounds have a normal deviation on dating accuracy of plus or minus 10 to 14 days depending upon when in pregnancy the test was done.
Answered 7/25/2017
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