Normal fetal ultrasound results do not
guarantee a normal, healthy baby.
Your doctor may recommend
more tests or procedures if the results of your fetal ultrasound are not
A photograph or videotape of the ultrasound
image of the fetus is sometimes available to you.
date may be changed based on an ultrasound done in early pregnancy if the
ultrasound predicts a different date, based on fetal size and
Ultrasounds do not always show birth
In the third
trimester, fetal ultrasound does not accurately
determine fetal age or weight.
The effects of prolonged fetal
ultrasound exposure have not been determined. So the U.S. Food and Drug
Administration (FDA) does not recommend fetal ultrasound for nonmedical
reasons, such as for identifying the sex of the fetus or as personal keepsakes.
Three-dimensional (3-D) fetal ultrasound is being
tested for use in evaluating fetal abnormalities. It is not yet widely
Doppler ultrasound (or duplex scanning) uses reflected
sound waves to estimate the speed and direction of blood as it flows to the
placenta and within the fetus. For more information, see the topic
Other Places To Get Help
American Congress of Obstetricians and Gynecologists