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
Thank
Get help from a real doctor now
Dr. Jane Van Dis
Board Certified, Obstetrics & Gynecology
15 years in practice
47M people helped
Continue
111,000 doctors available
Read more answers from doctors