Generally speaking, the IUD can be placed about 42 days after normal delivery, but there are certain prerequisites. If the examination results show that the uterus has recovered normally and the lateral perineal incision wound, cervical laceration or perineal laceration has recovered well, without redness, swelling, oozing and bleeding, the IUD can be placed. After a normal delivery, the uterus and other organs of the mother need time to recover, so the 42-day puerperium period is not suitable for intravaginal operations, which can easily lead to infection. Therefore, it is safer to perform the IUD after 42 days of delivery. In addition, patients should take proper rest for at least two weeks after IUD placement, not to overexert themselves, not to do strenuous exercise, and to keep the reproductive tract clean and hygienic, and to stop having sex and bathing within two weeks to one month.