Biomarkers such as troponins, brain natriuretic peptide (BNP), N-terminal pro-BNP (NT-proBNP), and mid-regional pro-atrial natriuretic peptides (MR-proANP) are routinely used in the diagnosis and monitoring of HF, including PPCM [15, 62, 63]. Here, NPPB is linked to hydrops fetalis.