The prostate is located at the base of the penis just below the bladder and in front of the rectum. It surrounds the upper part of the urethra, the tube that carries the urine and assists in the transport of semen during ejaculation.
The size of the prostate can vary; usually it is about the size and shape of a walnut.
Male sex hormones affect the prostate gland. They stimulate the production of prostate cells and the activity of the prostate. The most abundant male hormone is called testosterone.
