title: General and selective isolation procedures for GC/MS analysis of steroids in tissues and body fluids.
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D004997:Ethinyl Estradiol / Q000652:urine; D005260:Female; D006728:Hormones / Q000032:analysis*; D006801:Humans; D006854:Hydrocortisone / Q000652:urine; D013058:Mass Spectrometry / Q000379:methods; D009644:Norgestrel / Q000652:urine; D011374:Progesterone / Q000652:urine; D013256:Steroids / Q000032:analysis*
chemical_list: D006728:Hormones; D013256:Steroids; D009644:Norgestrel; D004997:Ethinyl Estradiol; D011374:Progesterone; D006854:Hydrocortisone