Zaņartu, J Fertility inhibition by an injectable progestogen acting for 3 months. A clinical survey of 130 fertile women treated with norethisterone enanthate. [electronic resource] - Obstetrics and gynecology May 1968 - 627-33 p. digital Publication Type: Journal Article ISSN: 0029-7844 Standard No.: 10.1097/00006250-196805000-00005 doi Subjects--Topical Terms: AdultAmenorrhea--drug therapyContraceptive Agents--administration & dosageContraceptives, Oral--therapeutic useFemaleFertility--drug effectsHumansInjections, IntramuscularMenstruation--drug effectsMetrorrhagia--drug therapyNorethindrone--administration & dosageOvary--pathologyTime Factors