title: Validity of the lecithin-sphingomyelin (L-S) ratio for amniotic fluid containing blood.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D001769:Blood; D002498:Centrifugation; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D010713:Phosphatidylcholines / Q000032:analysis*; D010949:Plasma; D011247:Pregnancy; D013048:Specimen Handling; D013109:Sphingomyelins / Q000032:analysis*; D013997:Time Factors
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins