title: Mass fragmentography as a reference method for the gas chromatographic determination of individual 17-oxosteroids and of pregnanediol in urine.
mesh_terms: D015068:17-Ketosteroids / Q000652:urine*; D002849:Chromatography, Gas; D011276:Pregnanediol / Q000652:urine*
chemical_list: D015068:17-Ketosteroids; D011276:Pregnanediol