title: Monitoring of the oral contraceptive 17-alpha-ethinyloestradiol-17 beta in human plasma by isotopic-dilution mass spectrometry.
authors.forename: L
authors.initials: L
authors.lastname: Siekmann
authors.forename: A
authors.initials: A
authors.lastname: Siekmann
authors.forename: H
authors.initials: H
authors.lastname: Breuer
mesh_terms: D019411:Clinical Laboratory Techniques; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003278:Contraceptives, Oral, Hormonal; D003933:Diagnosis; D004997:Ethinyl Estradiol; D005193:Family Planning Services
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003278:Contraceptives, Oral, Hormonal; D004997:Ethinyl Estradiol
keywords: Contraception; Contraceptive Agents, Estrogen--analysis; Contraceptive Agents, Female--analysis; Contraceptive Agents--analysis; Ethinyl Estradiol--analysis; Examinations And Diagnoses; Family Planning; Laboratory Examinations And Diagnoses; Laboratory Procedures