title: Factors affecting the duration of action of the injectable contraceptive norethisterone enanthate.
authors.forename: K
authors.initials: K
authors.lastname: Fotherby
mesh_terms: D001695:Biology; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D005193:Family Planning Services; D006805:Human Experimentation; D007267:Injections; D008660:Metabolism; D009640:Norethindrone; D010827:Physiology; D012106:Research; D013256:Steroids
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D013256:Steroids; D009640:Norethindrone
keywords: Biology; Clinical Research; Contraception; Contraceptive Agents, Female--administraction and dosage; Contraceptive Agents, Progestin--administraction and dosage; Contraceptive Agents--administraction and dosage; Contraceptive Methods; Family Planning; Human Volunteers; Injectables; Metabolic Effects; Norethindrone Enanthate--administraction and dosage; Norethindrone--administraction and dosage; Physiology; Research Methodology; Steroid Metabolic Effects