The IUD is an intrauterine device that is placed in the uterus, and it is also effective as a contraceptive when it is placed for 8 days. If you don’t want to get pregnant, IUD surgery is also a good way of contraception, as long as the IUD after intercourse to play a contraceptive effect, usually does not cause pregnancy. But usually after the IUD, premature sex, easy to affect the recovery of its genitals, causing gynecological diseases and infections. In addition, a woman can not have sex within a short period of time after the implantation of the ring, which may cause the dislodgement of the birth control ring, displacement and so on. So that the ring changes, resulting in the impact of the contraceptive effect. It is best to have intercourse 2 weeks after the IUD, so as not to cause irregular vaginal bleeding. Keep your vagina hygienic and change your underwear frequently. The specific situation needs to be decided in an interview.