title: The interpretation and significance of the lecithin-sphingomyelin ratio in amniotic fluid.
mesh_terms: D000096:Acetone; D000653:Amniotic Fluid / Q000032:analysis*; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D003720:Densitometry; D005314:Embryonic and Fetal Development; D005321:Extraembryonic Membranes; D005260:Female; D005865:Gestational Age; D006801:Humans; D008168:Lung / Q000196:embryology; D010713:Phosphatidylcholines / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis; D011247:Pregnancy; D012421:Rupture; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins; D000096:Acetone; D010758:Phosphorus