title: The metabolic clearance rate and urinary excretion of oral contraceptive drugs. I. Norethindrone.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000818:Animals; D004285:Dogs; D005243:Feces / Q000032:analysis; D005260:Female; D006801:Humans; D006868:Hydrolysis; D007275:Injections, Intravenous; D008099:Liver / Q000378:metabolism; D008657:Metabolic Clearance Rate; D008722:Methods; D009640:Norethindrone / Q000008:administration & dosage / Q000097:blood / Q000378:metabolism* / Q000652:urine; D013053:Spectrophotometry; D013997:Time Factors; D014316:Tritium
chemical_list: D014316:Tritium; D009640:Norethindrone