IUDs (intrauterine devices) are the forgotten form of birth control in America. Yet in other developed countries, the tiny, T-shaped device, which gets implanted in the uterus, is one of the most popular methods of birth control. What happened? One heavily marketed brand gave IUDs a bad rap in the '70s, and American marketers and doctors have shied away from it since. In fact, many doctors go through medical school without ever learning how to insert one. No wonder they don't recommend it!