For women who have already given birth, if they do not have the requirement to have children for the time being, but men are not willing to wear condoms for contraception, women can choose to place a birth control ring inside the uterine cavity for contraception, which is a relatively simple, safe and effective contraceptive measure. Since the IUD is a foreign body, it does cause side effects after it is placed. For example, the most common is the occurrence of spotting irregular bleeding after the IUD is placed, and there may also be a prolongation of the menstrual period, as well as an increase in the amount of menstruation. Some women may also experience lumbosacral pain and increased leukorrhea after IUD insertion. However, if the bleeding does not clear up for a long time after the IUD is inserted, it should be considered that the IUD is not adapted to the situation, and the IUD needs to be removed.