Spermatogonia are the self-renewing, mitotic germ cells of the testis from which sperm arise by means of the differentiation pathway known as spermatogenesis 1. By contrast with hematopoietic and ...

Spermatogenesis, the process by which spermatozoa are produced, is intricately regulated by hormonal factors. However, as men age, hormonal changes can adversely affect this process. The number of ...