“…Obstetric fistulae were reported in 35 (1.8%) of the 1933 patients, 33 being vesico-vaginal and two vesico-cutaneous fistulae. According to the respective authors, 12 of the fistulae were caused by pressure necrosis 26,28,29,37,39,67 (0.6% out of 1933); 11 by faulty technique, including surgical errors such as cutting the bladder or urethra, sometimes because of omitting the mandatory procedure of inserting a urinary catheter and pushing the urethra to the side 36,39,60,63,65 -67 (0.6%); six due to traumatic delivery such as tears from forceps 28,29,37 (0.3%) and in six cases (0.3%) the reason was not stated 7,25,36,63 .…”