1. Health
Send to a Friend via Email

Understanding Early Pregnancy / First Trimester Ultrasound Results


Updated April 23, 2014

2 of 7

Why Doctors Order Ultrasound in Early Pregnancy
Early Pregnancy

In early pregnancy, the ultrasound is attempting to get an image of a very small gestational sac.

Image © A.D.A.M.

Researchers have mapped out the expected measurements for specific points in early pregnancy, so an early ultrasound scan can give a doctor some important information.

A common use of ultrasound in early pregnancy is to calculate a gestational age. For this purpose, an ultrasound is considered a highly accurate means of dating a pregnancy. In a normal pregnancy, the ultrasound results can provide an estimate of the gestational age to within five to seven days of accuracy.

When a woman is having miscarriage symptoms, a doctor may order one or more ultrasounds to determine the viability of the pregnancy.

  1. About.com
  2. Health
  3. Miscarriage / Pregnancy Loss
  4. Symptoms & Diagnosis
  5. Diagnosing Pregnancy Loss
  6. Ultrasounds
  7. Ultrasound in Early Pregnancy - Why Doctors Order Early Ultrasounds

©2014 About.com. All rights reserved.

We comply with the HONcode standard
for trustworthy health
information: verify here.