NPPB and hydrops fetalis: PC (20:0/18:4), PC (20:4/20:0), PC (40:4), PC (20:4/18:0),and PC (34:4) were increased, whereas PC(32_0), PC(C34:4), and PC (36:5) were decreased in HF, thus giving PC a diagnostic value for HF similar to that of BNP [11, 38, 39].