Mannuel is a new intrauterine slow-release system, which is mainly an IUD containing levonorgestrel, and costs about$1,200. It releases 20ug of levonorgestrel per day through the intrauterine slow-release system, which serves to treat a number of diseases as well as contraception. It can be used mainly for the treatment of dysmenorrhea caused by endometriosis, the treatment of adenomyosis and adenofibroids, the prevention of recurrence of endometrial polyps after surgery, the treatment of endometrial hyperplasia and excessive menstruation. Although there are more therapeutic roles, patients should be informed before the IUD that vaginal drenching bleeding may occur 3-6 months after the IUD, which is normal, and that menorrhagia and amenorrhea may also occur. The size of the uterus should be known before the operation, and the uterine cavity should not be more than 8cm, if the uterine cavity is too large, it may cause detachment of the IUD. After the operation, it is forbidden to have sexual intercourse, prohibit strenuous exercise, prohibit doing some heavy physical labor work, and after the menstrual period is clean, it is necessary to review the ultrasound to know the position of the ring.