The effects of unilateral and bilateral vasectomy on the seminal characteristics, testosterone concentrations, and testicular parameters following castration were assessed. Immediately after vasectomy, the ejaculate volume declined in all vasectomized bucks, which was also found to increase afterward, irrespective of the groups. Concerning the color, the ejaculate was very light yellow in each vasectomized buck, while the typical milky appearance of the ejaculate was found in the control animals. The individual sperm motility was found to vary from 70.33% to 76.67% in the studied bucks, irrespective of the group before vasectomy. Following seven days of vasectomy, the sperm motility in unilaterally vasectomized bucks reduced to around 50%, whereas no individual sperm motility in all bilaterally vasectomized groups. In the plasmatic concentrations of testosterone, a marked decrease (p < 0.01) was observed in all the males from 2 to 6 weeks after the vasectomy. However, a gradual rise in the plasma levels of testosterone was also observed from 8 to 12 weeks after surgery. Before vasectomy, all bucks showed attraction to the goats ejaculating in the artificial vagina in a short time (<15-20 s) after contact with the goat in heat. From 10 weeks after vasectomy until the end of the experiment, the same bucks (four of the vasectomized and the control ones) that showed a recovery of the plasma levels of testosterone demonstrated normal libido and manifested attraction to the goats in heat. After 16 weeks of rearing, the bucks were subjected to castration to evaluate the testes and the epididymis. In the unilaterally vasectomized bucks, the vasectomized side was larger than the contra-lateral part and showed a nodule containing creamy material. The bilaterally vasectomized testis and epididymis were noticed to have more extensive morphology. These results demonstrate that vasectomy has little effect on the morphologic characteristics of the testis and epididymis. Though vasectomy did not affect the plasmatic concentrations of testosterone, it considerably affected the seminal parameters. Thereby, vasectomy can be used to develop teaser buck in the breed development program.