title: A modified procedure for evaluation of the lecithin-sphingomyelin ratio in amniotic fluid.
mesh_terms: D000096:Acetone; D000653:Amniotic Fluid / Q000032:analysis*; D001729:Bismuth; D002855:Chromatography, Thin Layer; D005069:Evaluation Studies as Topic; D005260:Female; D005865:Gestational Age; D006801:Humans; D007202:Indicators and Reagents; D007455:Iodine; D008168:Lung / Q000196:embryology; D008722:Methods; D010169:Palmitic Acids / Q000032:analysis; D010713:Phosphatidylcholines / Q000032:analysis*; D011247:Pregnancy; D013109:Sphingomyelins / Q000032:analysis*; D013997:Time Factors
chemical_list: D007202:Indicators and Reagents; D010169:Palmitic Acids; D010713:Phosphatidylcholines; D013109:Sphingomyelins; D000096:Acetone; D007455:Iodine; D001729:Bismuth