<prompt> Percentage of scar dehiscence in lower uterine segment caesarean section is: September 20090.1-22-55-9More than 10  <response>: Ans. A: 0.1-2 For women who had a prior cesarean bih the rupture can occur at the site of the previous uterine scar. The risk of uterine rupture is about 1.5 or less with the lower segment scar. It is estimated that between 4 and 9 of classical hysterotomy uterine scars are at risk for rupture. 