NPPB and hydrops fetalis: Due to receiver operating curve analysis, fresh and frozen urine NT-proBNP could diagnose HF with are aunder curve (AUC) of 0.73±0.04 (p<0.001) and 0.65±0.05 (p=0.01) with sensitivity and specificity of 73.97%, 58.62%, and 65.31%, 62.07%, for a cut-off of 94.2 and 96 pg/mL, respectively.