title: Lecithin-sphingomyelin ratios in amniotic fluid in normal and abnormal pregnancy.
mesh_terms: D000649:Amniocentesis; D000653:Amniotic Fluid / Q000032:analysis*; D001724:Birth Weight; D003720:Densitometry; D005314:Embryonic and Fetal Development; D005260:Female; D005315:Fetal Diseases / Q000150:complications; D005865:Gestational Age; D006801:Humans; D006973:Hypertension / Q000150:complications; D007231:Infant, Newborn; D008168:Lung / Q000196:embryology / Q000254:growth & development; D010713:Phosphatidylcholines / Q000032:analysis*; D010922:Placenta Diseases / Q000150:complications; D011225:Pre-Eclampsia / Q000150:complications; D011247:Pregnancy; D011248:Pregnancy Complications; D011254:Pregnancy in Diabetics; D011296:Prenatal Diagnosis; D012127:Respiratory Distress Syndrome, Newborn / Q000175:diagnosis; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins