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Photomicrographs of testicular sections stained with caspase-3 immunohistochemical stain ×400. (a) Group I presents scarce cytoplasmic reaction for caspase-3 in ST (arrows). (b) Group II shows widespread +ve caspase-3 immunoreactivity in the spermatogenic cells (arrows). (c) Group III appears with some caspase-3 +ve cells (arrows). (d) Group IV has very few spermatogenic cells exhibiting immunoreaction for caspase-3 (arrow)
