Orange square featuring the chemical symbol “Cu,” representing copper.

Paragard® works using just one simple active ingredient—copper. The copper IUD provides effective, hormone-free birth control by creating an environment that prevents sperm from reaching and fertilizing the egg. This copper IUD mechanism offers long-term pregnancy prevention for up to 10 years.

Vertical icon of a copper coil, symbolizing that Paragard is made entirely of copper.

Paragard works by preventing the sperm from reaching and fertilizing the egg. The copper wire wrapped around the T-shaped device releases copper ions that are toxic to sperm, effectively immobilizing them before they can reach the egg. This mechanism of action makes Paragard over 99% effective at preventing pregnancy, making it one of the most reliable forms of reversible birth control available.

Orange arrows arranged in a circle to depict the body’s natural menstrual cycle.

Because Paragard is hormone-free, it won’t prevent your natural menstrual cycle or stop you from ovulating each month. At first, periods may become heavier and longer with spotting in between, but many women find these changes decrease over time. For women seeking birth control without synthetic hormones, Paragard offers a solution that won’t prevent your natural menstrual cycle or stop you from ovulating each month.

Birth Control 101

How Birth Control Works

Circular icon made of dotted rings resembling a pack of birth‑control pills.

Hormonal Birth Control

Some hormonal birth control methods work by altering a woman’s natural menstrual cycle and stop the body from ovulating each month.

Small outline of a leaf indicating that the method is hormone‑free

Non-Hormonal Birth Control

Non-hormonal birth control methods won’t prevent a woman’s natural menstrual cycle or stop the body from ovulating each month. At first, periods may become heavier and longer with spotting in between.

Did You Know?

Orange square featuring the chemical symbol “Cu,” representing copper.

Paragard is the only copper IUD that’s been FDA approved for over 30 years.

Paragard is a hormone-free IUD (intrauterine device) that prevents pregnancy for up to 10 years using copper.

IMPORTANT SAFETY INFORMATION

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  • Don't use Paragard if you are or may be pregnant, have fibroids, a pelvic infection including pelvic inflammatory disease (PID), get infections easily, certain cancers, unexplained bleeding, Wilson's disease, or a copper allergy. IUDs, including Paragard, have been associated with an increased risk of PID.