Ultrasonography is a medical imaging technique that uses high-frequency sound waves to create images of the inside of the body. It is commonly used to visualize organs, tissues, and blood flow, helping doctors diagnose various conditions. The procedure is non-invasive and does not involve radiation, making it a safe option for patients. During an ultrasound exam, a small device called a transducer is placed on the skin, which emits sound waves. These waves bounce off internal structures and are converted into images displayed on a monitor. Ultrasonography is widely used in prenatal care to monitor the development of a fetus.