An IUD is an internal form of birth control placed inside the uterus with the strings hanging from the cervix. Learn about ...

IUDs are divided into two types: hormonal IUDs and copper IUDs. IUDs are long-acting reversible contraceptives and are one of the most effective, mistake-proof methods of birth control.

There are two types of IUDs — copper IUDs that do not release any hormones and hormonal IUDs that release a synthetic form of the hormone progesterone. Previous studies show that hormonal IUDs ...