This study was aimed at determining the blood serum testosterone level and its relationship with scrotal circumference and physical characteristics of semen in Nili-Ravi buffalo bulls. Semen samples were collected weekly from three buffalo bulls of 14 years age for 12 weeks and were evaluated for physical characteristics i.e. ejaculatory volume, sperm motility, sperm concentration, pH and sperm...

Follicle-stimulating hormone (FSH) plays an essential role in mammalian spermatogenesis and follicular development. In a previous study, we demonstrated that some bulls carry numerous linked mutations in the FSH beta-subunit (FSHB) gene, and that these bulls have poor-quality semen, low fertility, and slightly lower serum FSH concentration compared to those without such mutations. Here, we iden...

A previous study (Takahashi & Hanada, 1984) reported the penetration of zona-free hamster eggs by ejaculated bull spermatozoa after treatment with calcium ionophore A23187 (Ca-IA) in the presence of caffeine. Based on this study, successful IVF was accomplished not only in cattle (Hanada, 1986b) but also in goats and sheep (Hanada, 1986a) using spermatozoa treated with Ca-IA. In the present stu...

The fertility potential of an artificial insemination (AI) dose is a function of the quantity, quality and health status of the semen contained therein. Therefore, identification of additional semen quality attributes associated with fertility could provide more accurate methods to predict, manage and select for AI sire fertility of predicting a bull's fertility rat. The objective of this study...

background: suicide is one of the most important health problems in communities and knowledge of rates and epidemiology of it in any region could help in control and preventing programs .longitudinal registration of annual death data has been employed in this study. methods: in an analytical and cross sectional study pre conducted forms of suicide was engaged to register data , crude and specif...

Serum transminases and phosphatases were assayed in fertile and infertile cattle and buffalo bulls. Serum glutamate pyruvate transaminase (SGPT) did not differ significantly in relation to fertility and species. Serum glutamate oxaloacetate transaminase (SGOT) was higher in infertile than fertile bulls in both the species. The values were higher in cattle than buffalo bulls. The differences wer...