Study levels of Spermatogenesis Stimulating Hormone , Interstitial Cell Stimulating Hormone , Testosterone and Estradiol -17β after castration in the black buck goat

Abstract

The current study was conducted for the purpose of identification the effect of the castration in male goats on levels of reproductive hormones , and have included (25) males ranged from ages between (1.5-2.5) years old and was free of disease and reproductive problems. The animals this study were randomly subdivided into two groups (control group includes (10) male and experimental group includes (15) male) that housed in same conditions of nutrition and management.The levels of reproductive hormones include (Spermatogenesis Stimulating hormone (SSH) , Interstitial cell stimulating hormone (ICSH), testosterone and Estradiol -17β) were estimated two times before castration and in intervals of two weeks between examined, Experimental animals were examined after castration all hormones two weeks after castration, then after four weeks from castration .The method of analysis Radioimmunoassay (RIA) was use to measure the levels of reproductive hormones in animals blood serums . The results revealed that there are significant increased in the level of ICSH in experimental animals after castration (0.345 ± 0.0413) mIU / ml while the level of hormones testosterone and estradiol-17β significantly decrease in experimental animals after castration and the results were (0.0225 ± 0.0036) ng/ ml and (0.93 ± 0.15) pg/ ml, respectively. While castration did not show any significant effect on the levels of reproductive hormones SSH (0.145 ± 0.01) mIU/ ml in experimental group.