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Testosterone Test

Testosterone Test

-Testosterone is the main sex hormone in men, produced mainly by the testicles, and is responsible for male physical characteristics. Although it is considered to be a “male” sex hormone, it is present in the blood of both males and females.

-In males, testosterone stimulates development of secondary sex characteristics, including enlargement of the penis, growth of body hair, muscle development, and a deepening voice. It is present in large amounts in males during puberty and in adult males to regulate the sex drive and maintain muscle mass.

-In women, testosterone is converted to estradiol, the main sex hormone in females.

-Testosterone levels are diurnal, peaking in the early morning hours (about 4:00 to 8:00 am), with the lowest levels in the evening (about 4:00 to 8:00 pm). Levels also increase after exercise and also decrease with age.

The testosterone test may be used to help evaluate conditions such as:

• Delayed or precocious (early) puberty in boys
• Decreased sex drive in men and women
• Erectile dysfunction in men
• Infertility in men and women
• Testicular tumors in men
• Hypothalamus or pituitary disorders
• Hirsutism and virilization in girls and women.

the test may be ordered when infertility is suspected or when a man has a decreased sex drive or erectile dysfunction.

Sample :

A blood sample is taken by needle from a vein in the arm.

NORMAL RANGE:

TESTOSTERONE TOTAL:

HIGH RESULTS INDICATE:

MEN: High levels can indicate testicular tumors, adrenal tumors or anabolic steroid use.

WOMEN: High levels can indicate Polycystic Ovary Syndrome or an ovarian or adrenal gland tumor.

LOW RESULTS INDICATE:

MEN: Low levels may indicate hypothalamic or pituitary disease or damage to the testes.  It can also indicate testicular failure or infertility.

WOMEN: Women should have low levels.

Testosterone Test

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