A modified Gluck method for the lecithin/sphingomyelin ratio with increased specificity and validity.
D000653:Amniotic Fluid / Q000032:analysis; D005260:Female; D005325:Fetal Organ Maturity; D006801:Humans; D008168:Lung / Q000196:embryology; D010713:Phosphatidylcholines / Q000032:analysis*; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D013109:Sphingomyelins / Q000032:analysis*
D010713:Phosphatidylcholines; D013109:Sphingomyelins