Copper IUDs (intrauterine devices) are a safe and effective type of birth control. It works by preventing sperm from fertilizing any eggs. Learn more about how to determine whether it’s right ...

"The copper IUD has a piece of copper wire wound around the main body of the T, and some of the copper becomes oxidized when exposed to the uterine environment. These copper ions interact with ...

There are two types of IUDs: copper, which Planned Parenthood says can protect against pregnancy for up to 12 years, and hormonal, which can last from three to eight years depending on the brand.

Only one, Paragard, is of the nonhormonal type. Paragard is a copper IUD, while hormonal types release varying amounts of a synthetic hormone called progestin. These hormonal types can cause acne ...

The two major types of IUDs are: 1. Copper IUDs: Hormone-free devices that take advantage of the spermicidal properties of copper to prevent pregnancy. They can be used for up to 12 years.