The best age for women to remove the ring is from the transition to menopause within 1 year, when the cervical canal is not significantly atrophied and is easier to remove. Other indications for IUD removal are as follows: I. Normal conditions, no sex life, the need to replace the birth control device, the proposed change to other methods of contraception, such as drugs or bilateral tubal ligation. II. Pathological conditions, intrauterine pregnancy, ectopic pregnancy and other pregnancies with devices, those with excessive menstruation or significant dysmenorrhea, and those with downward migration of the birth control device. The Manned Luteal can be removed between the ages of 50-55. Follicle stimulating hormone can also be measured prior to removal to confirm menopause and then removed. Since progesterone can protect the endometrium, it can be removed until it fails. Mannorrhea contains 52mg of levonorgestrel, which releases 0.02mg/d at the beginning and 0.01-0.014mg/d after 5 years. Mannorrhea can significantly reduce menstrual flow and a small number of women may experience menopause without affecting ovulation. Clinically, Mannorrhea can be used to treat dysfunctional uterine bleeding, adenomyosis, etc.