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Male sterilization (vasectomy)
Permanent contraception to block or cut the vas deferens tubes that carry sperm from the testicles
How it works:
Keeps sperm out of ejaculated semen
Effectiveness to prevent pregnancy:
>99% after 3 months semen evaluation. 97–98% with no semen evaluation
3 months delay in taking effect while stored sperm is still present; does not affect male sexual performance; voluntary and informed choice is essential.