The purpose of this study was to compare N-BNP levels in infants with FTT with infants with severe HF and healthy controls.Methods. In a retrospective cohort study, we compared N-BNP levels from all consecutive infants with FTT and bodyweight below the tenth percentile (caloric deprivation (CD) group) to infants with severe HF. The gene discussed is NPPB; the disease is hydrops fetalis.