CRP and hydrops fetalis: All patients with HF were divided into four groups (group 1: FAR < 0.091 + CRP < 7.470, group 2: FAR < 0.091 + CRP ≥ 7.470, group 3: FAR ≥ 0.091 + CRP < 7.470, group 4: FAR ≥ 0.091 + CRP ≥ 7.470).