There are two main types of birth control rings: inert IUDs and active IUDs. An IUD is a contraceptive device that is placed in the uterine cavity and is often called a birth control ring because of its initial use in the form of a ring. IUDs are usually made of materials such as stainless steel, plastic, and silicone rubber, and are divided into two categories: inert IUDs and active IUDs. Inert IUD is simply using stainless steel wire surrounded by a ring, the ring does not add any drugs such as metal single ring, twist ring and stainless steel uterine ring, etc., is rarely used. Active intrauterine device is in the intrauterine device plus copper, progesterone, indomethacin, etc., can improve the contraceptive effect, is commonly used in our country, such as copper-containing T-ring, copper-containing Yuan Gong ring, copper-containing indomethacin-containing Yuan Gong ring, copper-containing indomethacin-containing γ-ring. There are many types of IUDs, so it is necessary to go to the hospital for examination and choose a suitable IUD according to your personal situation in order to avoid any adverse situation. If you have any other questions, it is recommended to consult a professional doctor for guidance.