A member asked:

Is a 8wks ultrasound accurate? it was suppose to be 10wks due date 7/13/15 but after u/s . it was 8 wks..and when did i conceive due date?? 07/27/2015

A doctor has provided 1 answer
Dr. Gerard Honore answered

Specializes in Fertility Medicine

Highly accurate: First trimester US based on CRL is accurate to +/- 2-3 days if done correctly. Your assumed 10 weeks/ EDD 7/13/15 is almost certainly incorrect. Conception is likely around November 3 2014, but this is just a calculated guess. Good wishes.

Answered 6/16/2015

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