Testosterone deficiency, also known as hypogonadism, is a condition in which the testes are unable to produce enough testosterone to fulfill the body's needs. Testosterone deficiency has many possible causes, including genetic abnormalities, injury to the testes, and being on certain medications. Normal aging also may play a role in the decline of male testosterone levels. It is also known as low testosterone.

The testes produce testosterone regulated by a complex chain of signals that begins in the brain. This chain is called the hypothalamic-pituitary-gonadal axis. The hypothalamus secretes gonadotropin-releasing hormone (GnRH) to the pituitary gland in spurts, which trigger the secretion of leutenizing hormone (LH) from the pituitary gland. This hormone stimulates the Leydig cells of the testes to produce testosterone. Normally, the testes produce 4-7 milligrams (mg) of testosterone each and every day.

After puberty, testosterone production increases rapidly, and will decrease rapidly after age 50. Recent estimates show that approximately 13 million men in the United States experience testosterone deficiency and

Studies also have shown that some men with obesity, diabetes, or hypertension may be twice as likely to have low testosterone levels, though as stated, low testosterone and testosterone deficiency can be caused by taking certain medications, chemotherapy, infections and other basic causes.

Signs of testosterone deficiency depend on the age of onset and the duration of hormonal deficiency. Congenital testosterone deficiency is usually characterized by underdeveloped genitalia, and sometimes even undeterminable genitalia. Acquired testosterone deficiency that develops near puberty can result in enlargement of breast tissue (gynecomastia), sparse or absent pubic and body hair, and underdeveloped penis, testes, and muscle. Adults may experience diminished libido, erectile dysfunction, muscle weakness, hair loss, depression, and other common mood disorders.

Testosterone Info provides detailed information about testosterone creams and supplements, low testosterone therapy, testosterone for women, and more. Testosterone Info is the sister site of Pheromones Web.

• CIALIS: The Impotence Killer


• Top Ten FAQs About Viagra


• 10 Common-sense Self Defense Tips For Men


• Cialis -Top Ten Questions And Answers


• What Should You Know About Reductil?


• Mens Skin Care is as Important as Skin Care for Women


• Mens Skin Care: Its a Guy Thing


• Penis Enlargement Methods


• Go Back to Vegetables to Fight Prostate Cancer


• Male Sexual Dysfunctions Rise from Medical Conditions


• Drug Companies Agree to New Advertising Guidelines


• What Is The Prostate?


• Pharmacological Treatment of Premature Ejaculation


• Prostata Cancer - Which Treatment is the Correct One?


• Things To Remember When Fingering A Girl