One method of sterilization of males is called vasectomy, in which a portion of each ducts (vas) deferens is removed. It is a relatively uncomplicated procedure and usually is done under local anesthesia. An incision is made in the scrotum, the ducts are located, each is tied in two places, and the portion between the ties is removed.
Although sperm production continues in the testes, sperm cannot reach the exterior because the ducts are cut.
The sperm degenerate and are destroyed by phagocytosis.
Vasectomy has no effect on sexual desire and performance. If done correctly, it is close to 100% effective. The procedure can be reserved, with a 45 to 60% chance sperm-specific protein appears after vasectomy. This may occur because some sperm escape from the cut ductus (Vas) deferens or because sperm antigens are processed and presented by antigen presenting cells, such as macrophages.
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