title: Selective isolation procedures for GC/MS analysis of ethynyl steroids in biological material.
mesh_terms: D004997:Ethinyl Estradiol / Q000097:blood / Q000302:isolation & purification* / Q000652:urine; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008297:Male; D009640:Norethindrone / Q000097:blood / Q000302:isolation & purification* / Q000652:urine; D009644:Norgestrel / Q000097:blood / Q000302:isolation & purification* / Q000652:urine; D010636:Phenols / Q000302:isolation & purification
chemical_list: D010636:Phenols; D009644:Norgestrel; D004997:Ethinyl Estradiol; D009640:Norethindrone