An intrauterine device (IUD) is a small, plastic, T-shaped device
that is inserted into the uterus to prevent pregnancy. IUDs contain copper or
the hormone levonorgestrel (LNg). Plastic strings tied to the end of the IUD
hang down through the opening of the uterus (cervix) into the vagina.
ByHealthwise Staff Primary Medical ReviewerSarah Marshall, MD - Family Medicine Specialist Medical ReviewerFemi Olatunbosun, MB, FRCSC - Obstetrics and Gynecology