title: Quantitative assay of anti-fertility agents by I.R. spectroscopy.
mesh_terms: D003276:Contraceptives, Oral / Q000032:analysis*; D004967:Estrogens / Q000032:analysis; D011372:Progestins / Q000032:analysis; D013055:Spectrophotometry, Infrared
chemical_list: D003276:Contraceptives, Oral; D004967:Estrogens; D011372:Progestins