Measurement of natriuretic peptides is useful to support a diagnosis or exclusion of HF; in stable patients, a concentration of brain natriuretic peptides ≥35–40 pg/mL or N‐terminal pro brain natriuretic peptides (NT‐proBNP) ≥125 pg/mL is suggestive of HF.29, 30, 31. Here, NPPB is linked to hydrops fetalis.