I just watched a documentary on PBS about women in Afghanistan. It was about different maternal health issues as well. One of the women had a serious fistula from her bladder to vagina as a result of childbirth and had to be operated on to fix it. The doctor in the movie told her that if she got pregnant again, she would need to go to a big city during her 8th month to get a c/s. He told her that if she tried to deliver vaginally, the fistula would open up again and could never be healed. Is this medically true?