title: Determination of fetal pulmonary maturity by amniotic fluid lecithin-sphingomyelin ratio and rapid shake test.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D005314:Embryonic and Fetal Development; D005260:Female; D005865:Gestational Age; D006801:Humans; D006819:Hyaline Membrane Disease / Q000209:etiology; D007231:Infant, Newborn; D008168:Lung / Q000196:embryology*; D008722:Methods; D010713:Phosphatidylcholines / Q000032:analysis*; D011247:Pregnancy; D011248:Pregnancy Complications; D012127:Respiratory Distress Syndrome, Newborn / Q000209:etiology; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins