Transvaginal ultrasound exam

During a transvaginal ultrasound, you lie on your back on an exam table. You have a narrow device, shaped like a wand, inserted into your vagina. This device is called a transducer. The transducer uses sound waves to create images of your ovaries and other pelvic organs. A polycystic ovary has many fluid-filled sacs, called follicles. Each dark circle shown above is one follicle in an ovary.

From Mayo Clinic to your inbox

Sign up for free, and stay up to date on research advancements, health tips and current health topics, like COVID-19, plus expertise on managing health.

To provide you with the most relevant and helpful information, and understand which information is beneficial, we may combine your email and website usage information with other information we have about you. If you are a Mayo Clinic patient, this could include protected health information. If we combine this information with your protected health information, we will treat all of that information as protected health information and will only use or disclose that information as set forth in our notice of privacy practices. You may opt-out of email communications at any time by clicking on the unsubscribe link in the e-mail.