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Vasectomy

The vas deferens carries spermatozoa from the epididymis, wherein they have drained from the testis, up to the ejaculatory ducts. These, in turn, open into the posterior urethra in and around the seminal vesicles and prostate gland. Male sterilisation can be achieved by obstructing the vas deferens and blocking the flow of spermatozoa into the ejaculatory ducts. This will not impair the sensation of ejaculation, but will result in a sterile ejaculate.