In human male, reproductive system becomes functional at the age of...

In human males, the reproductive system becomes functional at puberty, which occurs around the age of 12-15 years. Spermatogenesis, the process of sperm production, begins at this time and continues continuously throughout the life of the individual. Unlike human females, who experience menopause and a cessation of reproductive capability around the age of 50, males do not have a definitive end to their reproductive function, although the rate of sperm production and testosterone levels may gradually decline with advanced age.

Answer: throughout the life of the individual