title: A comparison of the lecithin-sphingomyelin ratio and shake test for estimating fetal pulmonary maturity.
mesh_terms: D000649:Amniocentesis; D000653:Amniotic Fluid / Q000032:analysis*; D005314:Embryonic and Fetal Development; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008168:Lung / Q000254:growth & development* / Q000502:physiology; D010713:Phosphatidylcholines / Q000032:analysis*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011379:Prognosis; D012127:Respiratory Distress Syndrome, Newborn / Q000175:diagnosis / Q000453:epidemiology; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins