There is no obvious age limit for women with IUDs, that is, placing IUDs, and it is suitable for adult women who do not have the need to have children for the time being, but there are certain requirements for the time of placing the IUDs. IUD is a safe, economical and effective reversible contraceptive method. The best time to place IUD is as follows: 1. 3~5 days after menstruation, when the uterine opening is relatively loose and easy to put in; it can also exclude pregnancy, and can maximize the avoidance of heavy bleeding caused by the IUD after placing. 2. If the IUD contains progestin, such as Mannuelle, it is usually placed when the menstruation is not clean, that is, around the first to third day of menstruation. 3. The IUD can be placed immediately after miscarriage or delivery. 4. It can be placed 42 days after delivery, and it can be placed at the same time of health checkup about 42 days after delivery, and it can be placed immediately after abortion, or it can be placed about half a year after cesarean section. Therefore, the best time for women to get an IUD should be chosen according to their personality characteristics, but also consider the type of IUD to be placed, and if you need to get an IUD, you need to go to the hospital and get it placed in accordance with the doctor’s instructions.