HP and hydrops fetalis: Plasma CRP [HF-150: 1.8 (0.8–12.5) mg/ml vs. HF-100: 0.8 (0.4–1.9) mg/ml; p = 0.18], SAA [HF-150: 13.5 (13.4–15.0) μg/ml vs. HF-100: 13.5 (13.4–15.4) μg/ml; p = 0.94], and haptoglobin [HF-150: 1.78 (1.08–4.42) mg/ml vs. HF-100: 1.77 (1.13–10.17) mg/ml; p = 0.83] concentrations were not significantly different at week 8 in both groups.