3D ultrasound is a new technical advance that gives complementary information to that provided by the 2D ultrasound. It may help to correctly diagnose fetal anomalies. VALUE OF 3D ULTRASOUND: Its major advantages are as follows: any section plane can be created within the volume, making it possible to realize sections perpendicular to the ultrasound beam; multiplanar view; storage of volumes that can be reviewed afterward and may be useful for educational purposes.