How effective are IUDs at preventing pregnancy?

Nov 03, 2021 Updated: Aug 28, 2025

The IUD is among the most effective methods out there. In fact, all of the IUDs are over 99% effective at preventing pregnancy.

In other words:

Fewer than 1 out of 100 people will get pregnant during the first year of using an IUD.

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IUD Mirena IUD birth control effectiveness hormonal IUD Copper IUD

Related methods

Dive in and learn all the details about these related birth control methods.

birth control
IUD
Super effective, lasts for years, low-maintenance, and private (though some partners can feel the strings). You can choose hormonal or non-hormonal.