What is Male Genital Development?
During puberty, a male’s sexual organs develop into mechanisms and structures capable of reproduction. Development of the male external genitalia-- the penis, testes and scrotum-- depends upon dihydrotestosterone, which is produced by the testes.
Puberty is initiated by hormone signals from the brain to the gonads - which in men are the testes. In response, the gonads produce a variety of hormones that stimulate the growth, function, or transformation of brain, bones, muscle, skin, breasts, and reproductive organs.
In boys, testicular enlargement is the first physical manifestation of puberty. Testicular size continues to increase throughout puberty, reaching maximal adult size about 6 years later.
The testes have two primary functions: to produce hormones and to produce sperm. The Cells of Leydig produce testosterone which in turn produces most of the changes of male sexual maturation and maintains or sex drive. Most of the increasing bulk of testicular tissue is spermatogenic tissue to produce sperm and fertility in (Males)
Within months after the growth of the testes begins, rising testosterone levels promote growth of the penis and scrotum. The penis continues to grow until about 18 years of age, reaching an average stretched adult size of about 13 cm.
Although erections and orgasm occur in prepubescent boys, they become much more common during puberty, accompanied by a markedly increased libido. Ejaculation becomes possible early in puberty. Prior to this, boys may experience dry orgasms. Emission of seminal fluid may occur due to masturbation or spontaneously during sleep.
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