Vasectomy is a simple, safe procedure that makes a man sterile (unable to father a child). It is the most effective birth control method for men.
Your Reproductive System
For pregnancy to occur, a man's sperm (male reproductive cells) must join with a woman's egg. To understand how a vasectomy works, you need to know how sperm are produced, stored, and released by the body.
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The urethra is the tube in the center of the penis. It transports both urine and semen. When you have an orgasm, semen is ejaculated out of the urethra.
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The seminal vesicles and the prostate gland secrete fluids called semen. This sticky, white fluid helps nourish sperm and carry them along.
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The epididymis is a coiled tube that holds the sperm while they mature.
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The scrotum is a pouch of skin that contains the testes.
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The testes are glands that produce sperm and male hormones.
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The vas deferens are tubes that carry the sperm from the epididymis to the penis.
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Sperm (shown magnified) carry genetic material.
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