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Following death due to trauma-related complications, a targeted post-mortem examination focused on the reproductive system and laboratory analyses were conducted to evaluate potential reproductive abnormalities. Macroscopic examination of the testis revealed no external alterations. However, histopathological evaluation confirmed moderate bilateral testicular degeneration, characterized by reduced seminiferous tubule diameter and epithelial height, vacuolization, germ cell loss, and premature shedding of immature cells into the lumen and epididymis. Approximately 70% of tubules were atrophic, although some retained limited spermatogenic activity. Epididymal sperm analysis revealed poor motility, reduced viability, and impaired plasma and acrosomal membrane integrity, along with a high proportion of morphological abnormalities. These findings were consistent with impaired spermatogenesis and functional compromise. No inflammatory infiltrates were observed, supporting a non-inflammatory, likely trauma-related etiology. To our knowledge, this is the first report documenting testicular degeneration in\n                    <jats:italic>P. yagouaroundi<\/jats:italic>\n                    . 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