Answer: Spermatogenesis begins at birth and continues throughout a man's life.
The process in which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis is known as Spermatogenesis. Thus, the process of spermatogenesis start with mitotic division of the stem cells that is located close to the basement membrane of the tubules. However, a mature male gametes known as sperm but it is commonly known as spermatozoa.