Which IUD is better varies from person to person. There are mainly inert IUDs, IUDs with copper, IUDs with progesterone, etc., and the right one is the good one. 1. Most of the inert IUDs are made of a stainless steel, plastic and silicone. For example, metal single rings, twisted rings and stainless steel bowed rings. 2. IUDs with copper are the most widely used active IUDs, which can be used to enhance the effectiveness of contraception by using copper to kill sperm or fertilized eggs. 3. There are also some IUDs containing progesterone, which can release progesterone into the uterine cavity for a long period of time, leading to atrophy of the uterine lining, which is not conducive to the implantation of a fertilized egg, and also reduces the amount of bleeding during menstruation. For women with dysmenorrhea, an IUD containing levonorgestrel can be used for contraception. This type of ring is more effective in contraception, can effectively reduce the amount of menstruation and relieve dysmenorrhea, but the side effects are mainly the possible presence of amenorrhea and spotting. For other rings containing medication, you need to choose according to the conditions of the local hospital or the type of ring provided by the family planning department. IUD contraception is a safe, effective, simple, economical and reversible method of birth control. There is no best choice, only the one that suits you best. You can learn about the role of each contraceptive ring appropriately at the hospital and make your choice under the guidance of your doctor.