NPPB and hydrops fetalis: Our results were homogenous for the NT-proBNP level (p = 0.88, I2 = 0%), length of stay in the hospital (p = 0.17, I2 = 43%), worsening HF (p = 0.36, I2 = 3%), and hospital readmission (p = 0.31, I2 = 16%).