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Asian-Australas J Anim Sci > Volume 4(1); 1991 > Article
Animal Reproduction and Physiology
Asian-Australasian Journal of Animal Sciences 1991;4(1): 1-5.
DOI: https://doi.org/10.5713/ajas.1991.1    Published online March 1, 1991.
Effect of pregnant mare's serum gonadotropin (PMSG) on testicular function in the immature buffalo bull (Bubalus Bubalis)
M. Arif, N. Ahmad, M. Shahab, M. Arslan
Abstract
Tesponsiveness of the testis to pregnant mare`s serum gonadotropin (PMSG) wha studied in immature Nili-Ravi buffalo bulls. Four month old bull calves weighing between 66 to 100 kg raised under uniform condition, were treated with 1000 IU PMSG or vehicle, daily, for six days. PMSG induced an increase in the size of the testis, enlargement of the seminiferous tubules and activation of the spermatogonia. The number of differentiated Leydig cells in the testis of gonadotropin treated animals increased considerably over that of the control testes. A significant increase in plasma testosterone concentrations was observed 24 h following the first injection of PMSG and the levels continued to increase until day 6. In vehicle treated animals plasma testosterone levels remained more or less at pretreatment values. The data suggest that buffalo bull testis is functionally responsive to gonadotropin at an early stage of prepubertal development.
Keywords: PMSG; Testis; Spermatogenesis; Testosterone; Buffalo


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