The Mannuelle IUD is a levonorgestrel intrauterine device that slowly releases a certain amount of progesterone in the uterus, 20μg per day, for a period of 5 years. In addition to being used in the process of contraception, the IUD can also be used in the treatment of other diseases, such as endometrial hyperplasia, adenomyosis, fibroids, or dysfunctional uterine bleeding, which can significantly reduce the amount of menstruation, inhibit endometrial hyperplasia, and alleviate menstrual cramps, and may cause a small amount of spotting of vaginal bleeding. In the process of application, there may be a small amount of vaginal bleeding, which is a kind of performance after the corresponding application and does not need special treatment.