Four proteins were significantly differentially expressed between non‐HF and the subtypes of HF (HFrEF and HFpEF): LRG1 (P < 0.001), ZA2G (P = 0.005), PON1 (P = 0.013), and APOA1 (P = 0.038). The gene discussed is LRG1; the disease is hydrops fetalis.