Before revision: diameter, the maximal opening in the bony pelvis (pelvic outlet), then there is no reason to perform an episiotomy to increase the diameter of the opening of the birth canal , i.e.
After revision: diameter, the maximal opening in the bony pelvis (pelvic outlet), then there is no reason ,asan episiotomy will not perform an episiotomy to increase the diameter of the opening of the birth canal any further i.e.