Figure 1 (a–c) Histopathological results of the testes for the animals in group 1 (control). (a) Closely packed seminiferous tubules in the testes (H&E, ×40). (b) Normal spermatogenesis and tubules in the testes (H&E, ×100). (c) Demonstrable spermatogenic series in the testes (H&E, ×400). Sections of (a–c) show numerous closely packed seminiferous tubules bounded by a thin basement membrane and separated by a fibrovascularstroma. These tubules contained numerous germ cells, developing to the lumen at different stages of maturation (demonstrable spermatogenic series) and interspersed by sertoli cells. The intervening fibrovascular stroma contained several interstitial cells of Leydig. Impression: normal spermatogenesis and tubules.