An ultrasound is a medical imaging technique that uses sound waves to create pictures of the inside of the body. It is commonly used during pregnancy to monitor the development of the baby, but it can also help doctors examine organs like the heart, liver, and kidneys. The procedure is safe, painless, and does not involve radiation, making it a preferred choice for many medical evaluations. During an ultrasound, a small device called a transducer is placed on the skin, which sends out sound waves. These waves bounce off tissues and return to the device, creating images that doctors can analyze. This technology helps in diagnosing various conditions and guiding treatment decisions.