“The progestins: chlormadinone acetate (0.05–10 mg), ethynodiol diacetate (2 mg), norethynodrel (20 mg), norethindrone (5 mg), medroxyprogesterone (10 mg), norgestrel (1 mg) and dimethisterone (2.5–20 mg) given daily in doses indicated significantly depressed plasma LH.”