Segre, E J Reduction of the oral contraceptive estrogen burden by alternate day estrogen administration. [electronic resource] - Contraception Aug 1975 - 155-74 p. digital Publication Type: Journal Article ISSN: 0010-7824 Standard No.: 10.1016/s0010-7824(75)80020-5 doi Subjects--Topical Terms: Drug Administration ScheduleDrug EvaluationEndometrium--drug effectsEthinyl Estradiol--administration & dosageFemaleHumansMenstruation--drug effectsMenstruation Disturbances--chemically inducedNorethindrone--administration & dosageOvulation--drug effectsPregnancy