progestin - any of a group of steroid hormones that have the effect of progesteroneLipo-Lutin, progesterone - a steroid hormone (trade name Lipo-Lutin) produced in the ovary; prepares and maintains the uterus for pregnancy norethynodrel - a progesterone derivative used in oral contraceptives and in the control of menstruation and the treatment of abnormal uterine bleeding norgestrel - synthetic progestin used in oral contraceptives |