The prostate is a small, muscular gland in the male reproductive system. Surrounding a portion of the bladder and urethra, the prostate produces most of the fluid in semen that allows sperm mobility during ejaculation. The muscular action of the prostate helps propel the fluid and semen through your penis during sexual climax.

Benign prostatic hypertrophy, or benign prostatic hyperplasia (BPH) occurs when the cells of the prostate gland begin to multiply. These additional cells swell your prostate gland, which squeezes the urethra and limits the flow of urine.

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