Sequential and combined therapy in oral contraception. Mode of action and efficiency.
D003276:Contraceptives, Oral / Q000494:pharmacology*; D005260:Female; D006801:Humans; D007986:Luteinizing Hormone / Q000378:metabolism*; D008525:Medroxyprogesterone / Q000494:pharmacology*; D009640:Norethindrone / Q000494:pharmacology*; D010060:Ovulation / Q000187:drug effects*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000209:etiology*; D011279:Pregnanetriol / Q000378:metabolism*; D014556:Urine
D003276:Contraceptives, Oral; D011279:Pregnanetriol; D007986:Luteinizing Hormone; D008525:Medroxyprogesterone; D009640:Norethindrone