How long can hormonal IUDs prevent pregnancy?

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Blister pack of 28 oral contraceptive pills arranged in four rows, with 21 white active pills followed by 7 orange inactive pills. Arrows indicate the order for taking pills. — birth control A 28-day package of birth control pills.

Hormonal intrauterine devices (IUDs) are a highly effective form of long-acting, reversible birth control. Depending on the specific product used, a hormonal IUD can provide protection against pregnancy for a period ranging from three to eight years.1

These devices function by continuously releasing the synthetic hormone progestin, which thickens cervical mucus to block sperm and thins the uterine lining. While they are designed for long-term use, they can be removed at any time, and fertility typically returns quickly following removal.1