title: Relationship between the lecithin/sphingomyelin ratio and the P value of amniotic fluid.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D005260:Female; D005454:Fluorescence Polarization; D006801:Humans; D008168:Lung / Q000196:embryology; D010713:Phosphatidylcholines / Q000032:analysis*; D011247:Pregnancy; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D010713:Phosphatidylcholines; D013109:Sphingomyelins