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Female sterilisation is a permanent method of contraception suitable for people who are sure they never want children or do not want any more children. It’s more than 99% effective. It works by stopping eggs and sperm from meeting by sealing or blocking the tubes carrying eggs from the ovaries to the womb.
Male sterilisation is a permanent method of contraception more commonly known as vasectomy, which is over 99% effective. You will still have erections and ejaculate (cum) normally. It is more than 99% effective.