Testosterone is the hormone responsible for deep voices, muscle mass, and facial and body hair patterns found in males. As men get older, the level of testosterone in the body and production of sperm gradually becomes lower, and they experience physical and psychological symptoms as a result of these low levels. This is part of the natural aging process and it is estimated that testosterone decreases about 10% every decade after men reach the age of 30.
Andropause is a condition that is associated with the decrease in the male hormone testosterone. It is unlike menopause in that the decrease in testosterone and the development of symptoms is more gradual than what occurs in women. Approximately 30% of men in their 50s will experience symptoms of andropause caused by low testosterone levels. A person experiencing andropause may have a number of symptoms related to the condition and could be at risk of other serious health conditions such as osteoporosis without proper treatment.