There are chances of you getting pregnant even when your tubes are tied; this can be experienced when a section of the fallopian tubes grows back together. The egg could still pass through the tubes and become fertilized. Though you should note that this procedure closes the fallopian tubes, keeping the egg from moving from the ovary to the uterus; it also prevents sperm from getting to the fallopian tube. This process "tubal ligation" is around 99.5 percent effective at preventing pregnancy. It is done by cutting, blocking or burning with the use of clips, bands, or rings.