Ultrasound uses sound waves to create a picture of the internal organs of the body. The sound waves are directed through a transducer. No radiation is involved. Gel is placed on the transducer. The transducer is placed on the area to be ultrasound. Sound waves hit tissue, fluid or bone and then the waves bounce back like echoes creating an image that is relayed onto a screen. Ultrasound is often used in obstetrics to examine the fetus. Ultrasound can be used to evaluate the age of the fetus, the number or fetuses, some birth defects, and the location of the placenta. A 3D ultrasound takes thousands of images at once. These images are then stored and shaded to create a 3D image. 4D is similar to 3D, but also shows movement. Advanced Ob/Gyn provides Level II ultrasounds related to checking the anatomy of the fetus and for other medical reasons. We can provide you with locations that provide both 3D and 4D ultrasound.