How accurate are sonograms for dating pregnancy

20-Sep-2017 19:41

However, transvaginal ultrasounds reveal the shape of the entire cervix, allowing doctors to see if the process has started, Berghella said.Better medical planning Estimating due dates more closely could help doctors make medical decisions."If her cervix is short, you could say, ' Oh, you can probably wait; you are probably going to go into labor,'" Berghella told Live Science.

A healthy pregnancy is, on average, 40 weeks from the last menstrual period, but in reality, most babies come sometime between 37 and 42 weeks gestation.For babies with congenital anomalies who must be delivered in a hospital, getting a better estimate of the due date could ensure safer delivery.