Effect of anti-rERp29 antibodies on sperm penetration assay. (A) FR at antibodies concentrations of 20, 50, 100, 200 μg/ml. (B) FI at the antibodies concentration of 20, 50, 100, 200 μg/ml (B was anti-rBPI at the antibodies concentration of 100 μg/ml; Data were presented as mean ± SEM. *P < 0.05, **P < 0.01). For all statistical figures, total number of oocytes used in each group was marked above the column.