Amniotic fluid optical density, lecithin/sphingomyelin ratio, and phosphatidylglycerol comparisons.
D000653:Amniotic Fluid / Q000032:analysis*; D005260:Female; D006801:Humans; D010713:Phosphatidylcholines / Q000032:analysis*; D010715:Phosphatidylglycerols / Q000032:analysis*; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D013109:Sphingomyelins / Q000032:analysis*
D010713:Phosphatidylcholines; D010715:Phosphatidylglycerols; D013109:Sphingomyelins