Used primarily as an emergency contraceptive to prevent pregnancy after unprotected intercourse or contraceptive failure. It works by delaying or inhibiting ovulation when taken within 120 hours of such events. Also investigated for the treatment of uterine fibroids due to its ability to modulate progesterone receptors, helping reduce fibroid size and associated symptoms before surgery. Its selective action on progesterone receptors makes it useful in managing hormone-sensitive conditions.