What is an ultrasound (a.k.a. sonogram)?
An ultrasound machine emits high-frequency sound waves that create echoes that “bounce around” inside of the body. These echoes are then absorbed by the machine and translated into a visual pattern on a monitor, allowing you to see a picture of your baby. Unlike x-rays which use radiation, ultrasounds use sound waves and are considered a safe way to view your baby and possibly see its heartbeat very early in pregnancy.