How long the IUD can be kept in the body is mainly determined by the material of the IUD. Most of the metal IUDs are valid for 10-15 years. If you need to continue contraception after the expiration date, you can take out the old IUD and put on a new one to continue contraception. If the IUD is made of plastic, it can be placed in the body for 5 years, for example, the T-ring commonly used in clinical practice, and the Mannuelle ring can only be placed for 5 years, and if contraception is still needed after 5 years, or if the treatment needs to be continued, the IUD will be replaced with a new one. No matter which kind of birth control ring you have, you need to do an ultrasound examination before removing the ring to rule out the possibility of incarceration of the ring, and also to know the exact location of the ring.