The IUD can be inserted in the case of coitus on the first day after the menstrual period has cleared. Because as an indication, if you are worried about pregnancy after intercourse, you can also have an IUD immediately, which can play a role in clinical contraception. However, it is recommended to do routine tests for leukorrhea to find out if there is any inflammation in the vagina and gynecological examination to rule out the possibility of pelvic inflammatory disease before the IUD is inserted. It is also recommended that you should not do heavy labor for one week and not have sex for half a month after the implantation of the IUD, so as not to cause inflammation of the vagina, cervix or pelvic cavity. In addition, it is recommended to resume menstruation once a month after the implantation of the IUD, check the IUD after menstruation to see if the position of the IUD is normal, and have an ultrasound examination once a year to see if the IUD has shifted.