Figure 5: The distribution of antibody titre in sera and seminal plasma. The antibody titre in sera, one-way analysis of variance (ANOVA) P -0.01 (a). Multiple comparisons made by the Games-Howell test indicated that after 6 weeks antibody titres were different from those in the untreated state (0 week), *P < 0.05, **P < 0.01. The antibody titre in seminal plasma (b). The data are expressed as the mean ± s.d. of three independent experiments.