intrauterine device [IUD]
An intrauterine device (IUD) is a form of birth control. It’s a tiny, plastic device that a doctor puts into the uterus to help prevent pregnancy. It can stay in place for up to several years and is one of the birth control methods that works best to prevent pregnancy. The 2 types of IUDs are:
- Copper IUD, which uses a tiny bit of copper to prevent pregnancy. This is also the most effective way to prevent pregnancy after unprotected sex (emergency contraception) if used within 5 days after sex.