An IUD is a small, T-shaped plastic device that is placed inside the uterus during an office visit. An IUD makes it harder for sperm to reach and fertilize an egg. There are two types: hormonal and non-hormonal IUDs. Studies show both are 99 percent effective in preventing pregnancy. How long they remain effective depends on the type of IUD you choose. Your doctor can help you determine which one is right for you.
- Hormonal IUDs release a small amount of the hormone progestin, which prevents sperm from entering the uterus by thickening cervical mucous. While the hormonal IUD is in place, it can lighten, shorten, or eliminate your menstrual cycle. There are several different hormonal IUDs approved for use in the U.S.
- Non-hormonal IUDs are also plastic, but they are wrapped in copper wire. They interfere with sperm movement and are as effective as hormonal IUDs. Because there are no hormones, it does not affect your menstrual cycle. Some people experience heavier and/or more painful periods with the copper IUD. Only one non-hormonal IUD is approved for use in the U.S.
Please note:
- IUDs do not affect your future fertility.
- IUDs do not protect against sexually transmitted diseases.
- They can be removed during an office visit and should be replaced after several years of use. The timing depends on the IUD you choose.
- Most insurance plans cover the placement and removal of an IUD. Check with your plan to determine your coverage.