What is an IUD?

An IUD (intrauterine device)—also known as an IUS (intrauterine system)—is a small device that’s placed in a woman’s uterus by a healthcare provider to prevent pregnancy. IUDs are long-lasting, reversible, and one of the most effective birth control methods available at over 99% effective.

There are two types of IUDs in the U.S.—hormonal and hormone free.

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