An IUD is a/an

An intrauterine device (IUD) is a small T-shaped device that is inserted into the uterus to prevent pregnancy. Some IUDs release copper while some release hormones. IUDs prevent conception by decreasing sperm motility, preventing implantation, or causing changes in the cervical mucus. It is important to note that while IUDs are highly effective at preventing pregnancy, they do not protect against sexually transmitted infections.