IUD is the placement of an intrauterine device as a contraceptive measure. There are different types of IUDs, and doctors choose according to the patient’s personal situation. This operation is suitable for women who have no contraindications during their reproductive period or who require the placement of IUDs: 1. The IUD is placed on the 4th-7th day of menstruation; 5. The IUD is placed on the 4th-7th day of menstruation for patients who have had a natural abortion, and on the 2nd normal menstruation for patients who have had a medical abortion; 6. Second, the placement method 1, preoperative examination: the doctor to check the size of the uterus, position and attachment; 2, position: the patient lies on the treatment chair with legs apart, positioned in the bladder truncated position; 3, disinfection: the doctor to disinfect the vulva, vagina, cervix and cervical canal; 4, IUD: the use of uterine probe needle along the uterine position to detect the depth of the uterine cavity, using the device to push the device into the uterine cavity. The operation can be completed by observing no bleeding. Rest for 3 days after the operation, avoid heavy physical labor for 1 week, avoid sexual intercourse and tub bath for 2 weeks, and keep the vulva clean. Follow-up visits will be conducted in the first, third, sixth and twelfth months of the first year after the operation, and once a year thereafter until discontinuation, and special cases will be seen at any time. Follow up the situation of IUD in the uterine cavity and deal with the problems in time to ensure the effectiveness of IUD contraception.