SOD1 and hydrops fetalis: Plasma SOD [HF-150: 0.61 (0.30–0.89) U/ml vs. HF-100: 0.53 (0.12–0.78) U/ml; p = 0.35], GPx [HF-150: 57 (36–108) U/g Hg vs. HF-100: 87 (35–132) U/g Hg; p = 0.37], and TAS [HF-150: 0.78 (0.45–1.20) mmol/ml vs. HF-100: 0.77 (0.25–1.12) mmol/ml; p = 0.63] concentrations were not significantly different at week 8 in both groups.