title: Correlation between amniotic fluid optical density and L/S ratio.
abstract: A test that circumvents the complex methodology needed for the determination of L/S ratios has been developed. It has been observed that the optical density, measured at 400 nm, of supernatants collected from fresh amniotic fluids centrifuged at 2000 g for 10 minutes correlates with L/S ratios.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis; D002498:Centrifugation; D003720:Densitometry; D005260:Female; D006801:Humans; D008722:Methods; D010713:Phosphatidylcholines / Q000032:analysis*; D011247:Pregnancy; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins