Used as a long-acting progestin in hormonal contraceptives, providing effective birth control through monthly injections. It works by suppressing ovulation, thickening cervical mucus, and altering the endometrium to prevent implantation. Often combined with estradiol valerate in injectable formulations to maintain cycle control and improve contraceptive efficacy. Also investigated for use in hormone replacement therapy and management of gynecological disorders like endometriosis and abnormal uterine bleeding.