In the clinic there is no life-long use of birth control ring, any birth control ring has a shelf life, all need to be removed. If the patient’s birth control ring has passed the shelf life, then the contraceptive effect will be reduced, the patient will be prone to unwanted pregnancy, and may stimulate the patient’s uterine cavity localization, resulting in the patient to appear similar to the inflammatory reaction, which leads to abdominal pain, vaginal bleeding, and so on. Even if the patient’s birth control ring has a very long shelf life and can be placed for a long period of time, the ring must be removed when the patient is menopausal. Although the shelf life of the ring still exists, it loses its contraceptive effect after the patient is menopausal. Moreover, this kind of birth control ring as a foreign body, placed in the patient’s uterine cavity for a long time, will cause damage to the patient’s body, because after the patient’s menopause, the uterus will atrophy, but the birth control ring will not atrophy, the birth control ring will gradually penetrate to the patient’s uterine myometrium or even pass through the myometrium to enter the patient’s pelvic cavity, affecting the patient’s intestinal tract, the ureter, so the patient’s body damage is relatively large.