After the IUD is placed in the uterus, it usually takes half a month before a woman can have intercourse overnight. This is because within half a month after the IUD is placed, the uterine opening is in an open state, and there may even be vaginal bleeding and symptoms of rejection. If you have intercourse during this period, it is easy to cause the upward infection of inflammation, resulting in women’s abdominal pain, and even the formation of pelvic inflammation, leading some women to mistakenly believe that their IUD is inappropriate, so to avoid the upward infection of inflammation. It is recommended to have intercourse half a month after the IUD, when it is relatively safe. After placing the IUD in the uterus, in addition to not having intercourse, it is also important to keep the vulva clean and hygienic, and not to exercise strenuously, so as not to overdo it, which may easily cause the IUD to displace or fall off. One month after menstruation, it is recommended to have an ultrasound examination in time to find out where the IUD is located.