GPT and hydrops fetalis: Significant differences were also detected in the comparison (t-test) between HF and LF-HC AST/ALT ratio after 12 and 18 months (P12M=0.003; P18M= 0.03), ALT and UHDL levels after 12 months (PALT=0.03, PUHDL=0.02), TRIG levels after 18 months (P=0.02).