1 Doctor agrees with this answer
Hi.. Any condition where normal vaginal delivery impairs the health of the mother or the fetus have to be managed by caesarian section.. Hence the need for c section is decided only at the time of delivery.. The size of the fetus and not the weight is taken into a consideration by the doctor for using c section.. So you may not know that you may need caesarian section till the time of delivery.. Only exception being if you have previous caesarian section or if you plan to undergoes delivery by section alone..