LAUSR

Testosterone is the major circulating androgen in males; essential for the development and maintenance of secondary sexual characteristics as well as initiation and maintenance of spermatogenesis [1]. Seminal plasma is a complex fluid composed of secretions produced by testes, epididymides and accessory sex glands (AG) and contains several components that play important roles in sperm maturation and fertilization [2]. It is know that the AG epithelium is androgen-dependent; the decrease of the testosterone levels induces a deficient function of these glands [3] and in rams, causes changes in seminal plasma proteome [4]. The aim of this study was to investigate the serum testosterone levels and expression of seminal plasma proteins after castration in stallions.