3D ultrasound provides a three dimensional image of the fetus. Sound waves are sent at different angles by the transducer for the computer to reconstruct the height, width, and depth of the image.
Review Date 1/10/2022
Updated by: John D. Jacobson, MD, Department of Obstetrics and Gynecology, Loma Linda University School of Medicine, Loma Linda, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.