PPARGC1A and hydrops fetalis: The ROC curve analysis showed that the AUC of PGC1α for the diagnosis of HF compared to non-HF was 0.843 (CI: 0.785–0.900), and the cut-off criterium was 293.918 nmol/L, suggesting that 293.918 could be used as the criterion for distinguishing HF from non-HF.