In particular, the group with low BNP (<200 pg/mL) but high d-ROMs showed a significantly 2-fold increased risk of HF hospitalisation (HR = 2.21; 95% CI = 1.06–4.71, p < 0.05) compared to the group with both low BNP and low d-ROM levels. The gene discussed is NPPB; the disease is hydrops fetalis.