The IUD is a birth control ring placed inside the uterine cavity. The advantage is that it is an effective contraceptive and prevents unwanted pregnancies. The disadvantages are that it may not be easy to remove in a small number of people, and the IUD may become infected. The IUD is one of the more common metal birth control rings. Women who do not want to have a baby for the time being can prevent unwanted pregnancy by inserting an IUD into the uterine cavity. The shape of the IUD is similar to the shape of the uterine cavity, so it will not come out easily for a short period of time after it is placed inside the body, and can be an effective contraceptive. The disadvantage of IUD is that there is no tail wire, and some people may not be able to remove it easily or it may become embedded, etc. It is recommended that the IUD should be properly placed under the guidance of a professional doctor to avoid discomfort. Some women may experience irregular menstruation and discomfort in the lumbosacral region, most of which will be relieved in 3-6 months. Women who need to place a birth control ring should go to a regular hospital, under the guidance of a doctor to place a suitable IUD, and after placing the IUD should be regularly reviewed, if discomfort occurs should consult a doctor in a timely manner.