The male does not begin to make sperm until after puberty is initiated. The synthesisation of new sperm is then continued throughout his life. Sperm is produced in the testicles, protected by the scrotum.
LH controls the secretion of the primary male sex hormone (testosterone). FSH, in conjunction with testosterone, is responsible for spermatogenesis.
Ejaculation is the reproductive indicator in the male. This may occur first with masturbation or nocturnal emission. The normal age range for a first ejaculation varies. Twelve to sixteen are common ages for the onset of puberty. Spermatogenesis usually occurs 1 to 2 years later.