The ring is mostly referred to clinically as the birth control ring, also known as the intrauterine device (IUD), and the omen of expiration may lead to contraceptive failure, resulting in unwanted pregnancy. At the same time, the expiration of the birth control ring may be deformed, fractured, displaced and so on, resulting in the birth control ring embedded in the uterine muscle layer, causing symptoms related to gynecological diseases. The longer the sterilization ring is used beyond its expiration date, the greater the chance of pelvic infection, and the risk of pregnancy with the ring and ectopic pregnancy gradually increases. When the IUD expires, it is prone to deformation, fracture, failure, adhesion, inlay, displacement and other bad reactions. Plastic IUDs are prone to deterioration and mixed rings are prone to breakage during removal, increasing the difficulty and risk of removing the IUD. Women who have an IUD should first learn about the type of IUD they have and its service life, and should replace it on schedule and not use it for an extended period of time. Before removing the IUD, relevant examinations should be carried out to confirm the position of the IUD and whether there is any inflammation in the cervix. After removing the IUD, women should pay attention to rest and prohibit coitus, tub bath and swimming for 2 weeks to avoid infection.