L-S ratio in predicting pulmonary maturity in utero.
D000649:Amniocentesis; D000653:Amniotic Fluid / Q000032:analysis*; D001835:Body Weight; D003404:Creatinine; D005314:Embryonic and Fetal Development; D005260:Female; D005865:Gestational Age; D006801:Humans; D008168:Lung / Q000196:embryology*; D008722:Methods; D010713:Phosphatidylcholines / Q000032:analysis*; D011247:Pregnancy; D013109:Sphingomyelins / Q000032:analysis*; D013997:Time Factors
D010713:Phosphatidylcholines; D013109:Sphingomyelins; D003404:Creatinine