The best time to replace the IUD is 3-7 days after menstruation, but some IUDs can lead to amenorrhea, for example, the Manned Ring can be replaced at any time if it has reached its expiration date and there is no menstruation or if there is no early pregnancy after a laboratory. Before replacing the IUD, an ultrasound should be done to understand the position of the IUD and to find out if the IUD is embedded. In addition, a routine white belt test should be done to find out if there is inflammation in the vagina and a gynecological examination to find out if there is inflammation in the pelvis. If there are no problems, the IUD can be replaced, and it is also recommended that the new IUD must know how long it is valid for and be replaced in time for the expiration date.