Male sterilization or vasectomy is surgery to cut the two vas deferens connecting the epididymis to the ejaculatory duct. After surgery, sperm produced in the testicles cannot pass through the ejaculatory duct to exit through the urethra when men have sex. The ejaculated semen does not contain sperm, so pregnancy cannot be achieved. Therefore, this is considered a permanent contraceptive method for men.
After sterilization, men can still have sex and ejaculate normally. Sterilization surgery only affects the path that carries sperm to the ejaculatory duct. The testicles can still produce sperm and the male sex hormone testosterone. Sterilization does not reduce testosterone levels in the body, so it does not affect sexual desire or physiological function.
You can have sex again two weeks after surgery, when the incision heals. However, 8-12 weeks after sterilization surgery, he should still use protection when having sex, because sperm is likely to remain in the tube leading to the penis, so he can still conceive successfully. .