Different hormones come to play in the male body system, right from the time the boy is in the womb to old age. They are responsible for the different stages in a man’s life as well as most characters associated with men. The Y chromosome plays a big role in the formation of testes from the embryonic tissue. From the tiny testes comes the hormone testosterone, which is responsible for the development of the scrotum and the penis.

After birth, nothing much happens in a boy’s hormones, until they reach puberty, when follicle stimulating hormone (FSH) and luteinizing hormone (LH) produced by the pituitary gland, stimulate more testosterone production, which stimulate the physical changes that transform the boy into a man. These are physical growth and muscle development, growth of pubic hair, enlargement of the penis, continual production of sperm and breaking of the voice. Sexual stimulation begins here.

As an adult, there is continual growth of hair on the face and body; and production of sperm. Hormones contribute to the much dreaded hair loss in adult males too!

When one begins to age, testosterone levels begin to go down. The result is loss of libido, poor erections, irritability, mood signs (yes, men too have this!) and loss of muscle. Learn more on andropause, male menopause from the source.