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Intrauterine device (IUD)

An intrauterine device (IUD) is a method of birth control that is placed inside the uterus to prevent pregnancy.

All IUDs have a plastic string that extends through the opening of the cervix into the vagina. The string allows a health professional to remove the device at your request or at the end of its effectiveness (usually anywhere from 3 to 12 years, depending on the type). Talk to your doctor about how long you can use it.

The IUD is very effective at preventing pregnancy.

Current as of: May 1, 2026

Author: WebMD Ignite Staff

Clinical Review Board
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

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