La Jolla, CA
A 21-year-old male asked:
Are abdominal ultrasounds as accurate for dating as vaginal around 11 weeks of pregnancy? what is the margin of error for abdominal at this gestation?
2 doctor answers • 4 doctors weighed in
Dr. Jane Van Disanswered
Obstetrics and Gynecology 20 years experience
Depends: If a woman is thin and the doctor has a good image of the fetus, then abdominal can be just as accurate as vaginal. Margin of error at this gestation is still +/- 5 days. After 14 weeks that number increases to +/- 10 days.
Created for people with ongoing healthcare needs but benefits everyone.
4.8k viewsReviewed >2 years ago
Dr. Liza Kunzanswered
Maternal-Fetal Medicine 23 years experience
Yes, if...: An abdominal ultrasound at 11 weeks is just as accurate for dating as vaginal (+\- 1 wk) if the image quality is good. You can see early fetal anatomy much better vaginally though.
Created for people with ongoing healthcare needs but benefits everyone.
4.8k viewsReviewed >2 years ago
Last updated Aug 21, 2017
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