tubaligation and pregnancy

A tuballigation is approximately 99% effective in the first year following the procedure – that means that there is almost no chance of pregnancy because fertile eggs can’t be released into uterus (they would need to go through tubes), but in the years after the surgery its effectiveness can be reduced because the fallopian tubes can reconnect which can cause unwanted pregnancy. But, if pregnancy does occur it carries a 33% chance of being an ectopic pregnancy which is a significant risk all for itself. So, as long as there is no connection between ovaries and the womb, spermatozoids don’t have a way to reach fertile eggs and there is only very small chance of pregnancy.