title: The effect of cold acetone fractionation on the total phospholipid value and the lecithin/sphingomyelin ratio of amniotic fluid.
mesh_terms: D000096:Acetone; D000653:Amniotic Fluid / Q000032:analysis*; D005591:Chemical Fractionation; D005260:Female; D006801:Humans; D008722:Methods; D010713:Phosphatidylcholines / Q000032:analysis*; D010743:Phospholipids / Q000032:analysis*; D011247:Pregnancy; D013109:Sphingomyelins / Q000032:analysis*
chemical_list: D010713:Phosphatidylcholines; D010743:Phospholipids; D013109:Sphingomyelins; D000096:Acetone