Two days after intercourse is generally not recommended for IUDs. The best time for a woman to place an IUD is about one week after her period, and without sexual intercourse, when there is usually no inflammation or infection in the woman’s body and the uterine lining is relatively thin, which is more favorable for the placement of the IUD. If the IUD is placed two days after intercourse, the risk of IUD infection may increase due to bacterial infection brought about during intercourse. In addition, if a woman has unprotected intercourse, it is also recommended that she undergoes a thorough examination after intercourse before choosing the time to place the IUD in order to avoid pregnancy with the IUD. If a woman experiences any discomfort such as abdominal pain or vaginal bleeding after IUD placement, it is recommended that she consult a doctor promptly.