1 doctor weighed in:

Is it possible for the gest sac to measure a week larger early in the first trimester? Could it be larger due to twins? How common are mistakes?

1 doctor weighed in
Dr. Darrin Cunningham
Obstetrics & Gynecology

In brief: Early

ultrasounds in the hands of an experienced ultrasonographer are vet accurate.
Doubt they would miss twins. They accurate within a week for dating the pregnancy.

In brief: Early

ultrasounds in the hands of an experienced ultrasonographer are vet accurate.
Doubt they would miss twins. They accurate within a week for dating the pregnancy.
Dr. Darrin Cunningham
Dr. Darrin Cunningham
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