Pregogest is used to treat various disorders. It is given to women with secondary amenorrhea (no menstruation for 3 months in women who have had their menses before). It is used to support pregnancy, prevent premature labor, and treat bleeding disorders that may occur before menopause. It may be used as a part of fertility treatment and may be given as hormone replacement therapy after menopause. It is also given to relieve symptoms of premenstrual syndrome and painful bleeding like in dysfunctional uterine bleeding.