Tubal ligation is a surgical procedure that permanently blocks the fallopian tubes, preventing pregnancy. The likelihood of getting pregnant after having a tubal ligation is very low, but it is not impossible.
Tubal ligation is highly effective in preventing pregnancy. However, no method of contraception is 100% effective. In the United States, about 5-10 out of every 1,000 women who have a tubal ligation will get pregnant within 10 years. This means that the success rate of tubal ligation is about 95-99%.