Table 3.

Comparing the number of spermatogonia, spermatocyte, spermatid and seminiferous tubules in different groups of rats after 28 days of treatment

Groups	Spermatogonia $\times$ 10${}^{\mathbf{6}}$	Spermatocyte $\times$ 10${}^{\mathbf{6}}$	seminiferous tubules $\times$ 10${}^{\mathbf{6}}$
Control	64.9 $\pm$ 0.26	203.9 $\pm$ 1.1	65.2 $\pm$ 0.86
Vehicle	64.96 $\pm$ 0.48	203.2 $\pm$ 0.28	64.7 $\pm$ 0.98
Micro-MnO${}_{\mathbf{2}}$	50.6 $\pm$ 0.52${}^{***}$	162.1 $\pm$ 0.62	58.7 $\pm$ 0.31
Nano-MnO${}_{\mathbf{2}}$	56.4 $\pm$ 0.31${}^{***\&\&\&}$	171.9 $\pm$ 0.50${}^{***\&\&\&}$	56.1 $\pm$ 0.6
Note: Values are mean $\pm$ STD; ***p $<$ 0.001 compared to the vehicle and control groups; ${}^{\&\&\&}$p $<$ 0.001 compared to the Nano-group; MnO${}_2$: Manganese Dioxide