Fig. 2.
a–f Sperm endpoints and seminiferous tubule degeneration in Nelore bulls immunized against GnRH once (group 1), twice (group 2), and controls (control group). a Sperm concentration, b sperm motility, c sperm vigor score (1 to 5 scale), d sperm swirling score (1 to 5 scale), e normal spermatozoa, and f boxplot of seminiferous tubule degeneration degree. *Difference (P<0.05) over time for the same group; †G1 vs CG (P<0.05); ‡G2 vs CG (P<0.05); §G1 vs G2 (P<0.05)