title: A comparison between the lecithin-sphingomyelin ratio and the "shake test" for the estimation of surfactant in amniotic fluid.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D000431:Ethanol; D005260:Female; D005865:Gestational Age; D006801:Humans; D006819:Hyaline Membrane Disease / Q000175:diagnosis; D007231:Infant, Newborn; D008168:Lung / Q000196:embryology; D008722:Methods; D010713:Phosphatidylcholines / Q000032:analysis*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011663:Pulmonary Surfactants / Q000032:analysis*; D012119:Respiration; D012965:Sodium Chloride; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D010713:Phosphatidylcholines; D011663:Pulmonary Surfactants; D013109:Sphingomyelins; D000431:Ethanol; D012965:Sodium Chloride