In some cases, after having your tubes tied, you can get pregnant when a small section of the fallopian tubes may grow back together. If this is the case, the egg could still travel through the tubes, where it could be met by sperm and become fertilized.n addition, it prevents sperm from reaching the fallopian tube. A tubal ligation is around 99.5% effective at preventing pregnancy. Still, it is not impossible for you to get pregnant with your tubes tied.