title: Analysis of nanogram quantities of norethisterone in plasma using a GC-MS-COM selective ion detection procedure.
mesh_terms: D000284:Administration, Oral; D002849:Chromatography, Gas; D003201:Computers; D004581:Electronics; D005260:Female; D006801:Humans; D013058:Mass Spectrometry; D008697:Methane; D008722:Methods; D008832:Microchemistry; D009640:Norethindrone / Q000008:administration & dosage / Q000097:blood*; D009644:Norgestrel / Q000032:analysis; D012825:Silicon; D013997:Time Factors; D014316:Tritium
chemical_list: D014316:Tritium; D009644:Norgestrel; D008697:Methane; D009640:Norethindrone; D012825:Silicon