I don't believe so, but I could be wrong.
When they "tie" your tubes, they aren't literally tied like a shoestring. Usually, they are caught up in a loop and then tied off at the base of the loop with whatever material your physician prefers to use. What happens to the loop is that the circulation is cut off, the tissue dies, and the loop above the tied off spot is no longer viable. So, even if the material that ties off the loop falls off after the loop dies off, it won't matter because the connection between your tube is gone.
Another surgery some physicians use is the cut and burn method. They will literally cut the tube in half and then burn the openings closed with a cautery iron.
Tubal ligations are 99.5% effective because sometimes the tubes can find a way to grow back together, the surgery could have been done wrong, or a woman is pregnant at the time of surgery.
at 6:57 PM on Apr. 22, 2009