A prenatal ultrasound test uses high-frequency sound waves, inaudible to the human ear, that are transmitted through the abdomen via a device called a transducer to look at the inside of the abdomen.

A pregnancy ultrasound is a test that uses high-frequency sound waves to image the developing baby as well as the mother’s reproductive organs. The average number of ultrasounds varies with each ...

Sonograms and ultrasounds are closely related but refer to different things. An ultrasound is an imaging tool that produces a sonogram. Often, the terms sonogram and ultrasound are used ...