Introduction to the uterine-type IUD The uterine-type IUD is a commonly used contraceptive method, which involves placing a small ring-shaped object in the uterine cavity. This IUD can provide women with contraceptive protection for up to 5 years. The main principle of the IUD is to use the hormones it releases to reduce the amount of menstrual cramps and thicken the cervical mucus to prevent sperm from passing through. To use it, first of all, 5-7 days before the menstrual period, a professional physician should insert the IUD into the vagina with gloves and let it reach the uterus. During installation,