Risk of sear rupture in classical cesarean section is –
The currently accepted indications for a classical cesarean section are:

Perimortem Cesarean Delivery
Placenta previa with fetal malpresentation such as transverse lie.
Preterm delivery in which the lower uterine segment is poorly developed.
Carcinoma cervix
0%-1-5%
l-5%-4%
10%- 12%
4%-9%