The semen quality is a basic and the most important indicator of male reproductive health. Mammalian spermatozoa undergo a series of complex structural and functional changes in the epididymis to mature and achieve fertilization capacity. Sperm cell maturation is mediated by a complex physiological process, which is synergistically regulated by a large number of transcription factors, hormones and other signaling molecules. In recent years, there is increasing evidence supporting the notion that functional ...