A hormonal IUD (intrauterine device) is a small, T-shaped contraceptive device that is inserted into the uterus by a healthcare provider. It releases a hormone called levonorgestrel, which helps prevent pregnancy by thickening cervical mucus, thinning the uterine lining, and sometimes inhibiting ovulation. Hormonal IUDs can provide long-term contraception, lasting between three to seven years, depending on the specific type. They are over 99% effective at preventing pregnancy and can also help reduce menstrual bleeding and cramps for some users. Regular check-ups with a healthcare provider are recommended to ensure proper placement and function.