Hindi ko na-encounter yan na kailangan i-soften ang cervix bago CS, pero honestly this is one of those medical questions na importante talaga i-clarify with your OB directly kasi bawat case different depending sa reason ng CS at kung planned or emergency ba! A few of my mum friends had CS, and walang nag-mention ng ganitong preparation, so definitely ask your doctor para sure sa specific plan nila para sa'yo.