Testis - metabolism, Cell Proliferation, Apoptosis - drug effects, bcl-X Protein - genetics, Male, Immunoenzyme Techniques, Testis - drug effects, X-Box Binding Protein 1, DNA-Binding Proteins - metabolism, Caspases - metabolism, Real-Time Polymerase Chain Reaction, bcl-2-Associated X Protein - genetics, Caspases - genetics, RNA, Messenger - genetics, bcl-2-...