This investigation was intended to portray the spermatogenic interaction and its occasional variety in Desmodus rotundus, in the Caatinga biome, a water-restricted environment, with checked water limitation during the greater part of the year. Assortments of grown-up creatures were performed during the dry and blustery seasons, and after willful extermination, their testicles were prepared histologically to perform morphological, morphometric, ultrastructural and immunohistochemical investigates. The level of seminiferous epithelium, number of Leydig cells per gram of testis, and populace of Sertoli cells and A-type spermatogonia introduced by D. rotundus were fundamentally higher in the stormy season, while the level of lumen, mitotic list, support limit performed by Sertoli cells, and generally speaking yield of spermatogenesis were higher in the dry season. The ultrastructure of spermatogenesis was like that depicted in different warm blooded creatures, and the immunohistochemical investigation uncovered action of the aromatase chemical in Sertoli cells, Leydig cells, spermatocytes and spermatids, just as the presence of androgen receptors in Sertoli cells and Leydig cells. FGF2 action was identified in essential spermatocytes in zygotene and pachytene, just as auxiliary spermatocytes and adjusted and extended spermatids, while the BCL-2 protein was communicated in essential spermatocytes in zygotene and pachytene, optional spermatocytes, and adjusted spermatids. The action of these particles was comparable in the two seasons, and connected with the morphometric discoveries, shows upkeep in the respectability of the seminiferous epithelium consistently. The occasional investigation of D. rotundus spermatogenesis demonstrates a ceaseless spermatogenesis design and recommends a more noteworthy creation of spermatozoa in the stormy season in the Caatinga biome.

D. rotundus is an animal groups confined to the Americas, with a fascinating hematophagous dietary pattern, the solitary species had practical experience in the utilization of the blood of well evolved creatures, and the most plentiful vampire bat species. Some morphological investigations have been directed to all the more likely comprehend its conceptive cycle, focusing on the two its preservation and a sane administration of the species. This examination consequently addresses an extra exertion towards understanding the occasional proliferation of this species in a locale that faces shortage of water and food assets during an impressive time of the year, zeroing in on the testicular morphology of guys, since concentrates on spermatogenesis are scant. The presence of pregnant females saw in the assortment territory during the entire year proposes a ceaseless conceptive cycle for the species, in spite of a portion of the spermatogenic boundaries assessed shows more prominent qualities in some season, as we will talk about beneath.

It can be concluded that D. rotundus showed greater development of the seminiferous epithelium during the rainy season and a higher overall yield of spermatogenesis during the dry season. The morphometric findings of the animals sampled in this study, which were inhabitants of the Caatinga Biome, showed marked differences in relation to individuals of the same species, which were inhabitants of the Atlantic Forest Biome. However, the morphometry of the germline cells, Sertoli cells and Leydig cells, associated with the relatively constant expression of androgen receptors, aromatase, FGF2 and BCL-2 throughout the year, allowed the continuation of spermatogenesis without a period of reproductive inactivity, even in periods of scarce food resources, as in the dry season, although sperm production is higher in the rainy season.