About the Testes
testes, or testicles are a pair of oval organs in men that produce sperm and
male hormone testosterone. The testes are located in the scrotum,
the sac that hangs below the base of the penis.
When a boy reaches puberty, special coiled tubes inside his testes begin
to make sperm. From this point on, the boy’s testes continue producing
sperm for the rest of his life, at the rate of hundreds of millions each
The testes also produce and release testosterone. This hormone is a major
part of puberty in boys. As a boy goes through puberty, his testes
produce more and more testosterone, which causes him to develop
a deeper voice, bigger
muscles, and body and facial hair, among other things.
Normal Puberty in the Boy
At some point, usually after a boy’s 10th birthday, puberty begins
when the hypothalamus releases gonadotropin-releasing hormone (GnRH). When
reaches his pituitary gland, it stimulates the pituitary to release
two more hormones—luteinizing hormone (LH) and follicle-stimulating
These hormones (LH and FSH) go to the testes and give the signal to start
sperm production. They also trigger the production of the male sex hormone—testosterone.
This hormone is then responsible for the characteristic changes
that a boy goes through during puberty. These changes include:
- Body Shape—the
boy gets taller and his shoulders get broader.
He also gains a lot of weight, much of it due
to an increase in the size of his muscles.
- Breasts—many boys experience
swelling under their nipples—this
is known as gynecomastia, and is temporary.
- Voice—the voice gets
- Hair—hair appears under the arms, on the legs and face,
and above the penis. Chest hair may appear
during puberty or years after, although not all men develop
- Skin—the skin may get oilier and the boy
may sweat more. In addition, acne may develop
and is normal during this time
when hormone levels are high.
- Penis and Testicles—the penis and
testes get larger. The boy may have erections more often due to an
in sex hormones. He will also begin to produce sperm during puberty
and will start to experience ejaculation.
AND PROCEDURES FOR DISORDERS OF THE
FOR DISORDERS OF THE TESTES
listing provides you with Internet sites that are sponsored
by government agencies or are well-known and credible
to the Testes Resource Directory
AUDIO & VIDEO
CLIPS FROM YOUR DOCTOR
Last modified on: 30 June 2015