The IUD is inserted into the uterine cavity and then gently withdrawn, which is the main method of insertion of the IUD. The IUD can be inserted two days after your period has cleared, for example, if your period has cleared on the fifth day, you can have the IUD inserted on the fourth day. This requires a routine leukorrhea test before menstruation, mainly to find out whether there is inflammation in the vagina, and if there is vaginitis, it can be cured before the IUD can be inserted. The IUD is not only a contraceptive, but also a treatment for excessive menstruation and adenomyosis, and is valid for five years. After five years, if you need to continue the contraception, or if you need to continue the treatment, you will need to replace the IUD with a new one.