Physiological Features of Male Gonads in the Postnatal Period

A feature of spermatogenesis in multicellular animals is the presence of cytoplasmic bridges between dividing spermatogenic cells, due to which synchronous development of germ cells is achieved [11]. Spermatogenesis, by analogy with oogenesis, can be divided into four periods: the reproductive period; the growth period during which there is a noticeable increase in the size of the germ cells; the maturation period including meiosis; the period of formation that ends with the appearance of sperm [12]. However, in modern literature it is more common to divide spermatogenesis into three stages, since the growth of male germ cells during spermatogenesis is poorly expressed [13].