Testosterone is the hormone responsible for masculine growth and development in male, when this hormone is not produced enough the condition is known as Male hypogonadism. This condition may is from the birth of an individual or it may occur in the middle due to injuries or infections.
This condition comes out with infertility, decrease in muscle mass and bone mass, etc during adulthood. In Poland The prevalence of testosterone deficiency was 17, 33, 42 and 57% for testosterone levels of less than 200, 250, 300 and 350 ng/dL, respectively. Only 47% patients had testosterone levels in the normal range (>350 ng/dL).