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Photomicrograph of longitudinal sections of testes in BrdU labeled MSCs injected group after monoclonal anti BrdU staining and alcian blue counterstaining. Colony of MSCs (A) in seminiferous tubules (400×); spermatogonium (S) (B) and spermatogonia (S) and primary spermatocytes (P) (C), sperm cluster (thin arrow) and spermatids (thick arrow) (D) in seminiferous tubules (1000×) and (E) Leydig cells (L) between seminiferous tubules (1000×).
