It is called andropause to the progressive decrease in sexual function in men. While women experience a rapid change in fertility (menopause ) in men occurs gradually, and is the process that describes andropause. it loses potency because of natural decrease in testosterone levels in the body. Symptoms include, among others, irritability, insomnia, depression, anxiety, bone deterioration, circulatory problems, decreased sex drive, low sexual desire, and reduction in the strength and volume of ejaculation. The treatment of andropause, which in most cases is not necessary, usually to supply testosterone orally or by intramuscular injections.