Tubal ligation
（重定向自Tubal sterilization）
Tubal ligation or tubectomy (also known as having one's "tubes tied") is a surgical procedure for sterilization in which a woman's fallopian tubes are clamped and blocked or severed and sealed, either of which prevents eggs from reaching the uterus for fertilization. Tubal ligation is considered a permanent method of sterilization and birth control.