What Is an Intrauterine Device (IUD)?
The intrauterine device (IUD), previously also called a coil or loop, is a birth control device placed into a woman’s uterus by a medical professional. It can stay in the uterus for 1 to 10 years. It is usually made of plastic or metal with a string attached. Some IUDs contain copper or the female hormone progesterone. The IUD prevents pregnancy by changing the physical environment of the reproductive tract. These changes appear to prevent the egg from being fertilized. There has been some controversy over the use of the IUD because of its association with pelvic infections. Talk to your health care provider about the risks of using an IUD if you have had any of the following problems: • heavy menstrual bleeding • an infection in any of your reproductive organs (ovaries, uterus, fallopian tubes) • a pregnancy in your fallopian tube (ectopic pregnancy).
