title: Total lipids and the lecithin-sphingomyelin ratio of amniotic fluid: an antenatal test of lung immaturity?
mesh_terms: D000649:Amniocentesis; D000653:Amniotic Fluid / Q000032:analysis*; D002855:Chromatography, Thin Layer; D005260:Female; D005865:Gestational Age; D006801:Humans; D006819:Hyaline Membrane Disease / Q000378:metabolism; D007231:Infant, Newborn; D007743:Labor, Obstetric; D008055:Lipids / Q000032:analysis*; D008168:Lung / Q000196:embryology / Q000254:growth & development*; D010713:Phosphatidylcholines / Q000032:analysis*; D011247:Pregnancy; D011663:Pulmonary Surfactants / Q000032:analysis; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D008055:Lipids; D010713:Phosphatidylcholines; D011663:Pulmonary Surfactants; D013109:Sphingomyelins