What Is a Fetal Ultrasound? ‌A fetal ultrasound is a test carried out during pregnancy that uses sound waves to create an image of your baby in the uterus. An ultrasound is a normal part of prenatal ...

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.

In early pregnancy, the fetal pole is the first stage of embryonic growth visible on an ultrasound. Find out what it means when the fetal pole isn't visible. Krissi Danielsson is the author of After ...