title: Analysis of norethindrone in plasma by high-performance liquid chromatography.
authors.forename: J C
authors.initials: JC
authors.lastname: Loo
authors.forename: R
authors.initials: R
authors.lastname: Brien
mesh_terms: D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D005193:Family Planning Services; D009640:Norethindrone; D012106:Research
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D009640:Norethindrone
keywords: Clinical Research; Contraception; Contraceptive Agents, Female--analysis; Contraceptive Agents, Progestin; Contraceptive Agents--analysis; Family Planning; Norethindrone--analysis; Oral Contraceptives; Research Methodology