The IUD can be placed for a long time and may cause back pain, cramping, increased menstrual flow with blood clots, prolonged periods and even unwanted pregnancy. If the IUD is placed for a long time, exceeding the expiration date may also lead to contraceptive failure and irregular vaginal bleeding. Fluoroscopy is needed every year after the IUD is placed to see if the IUD is displaced in the uterine cavity. For women of childbearing age who want to use long-term contraception, the IUD is a more effective contraceptive measure with fewer side effects, and they can prepare for pregnancy 3 months after removing the IUD.