Instead of going along with Bella's choice, what if Edward had taken action against the child growing inside her? Story is not for the faint-hearted, and DOES NOT end with a happy ending.
What happens if Bella died during the process of the placenta breaking and going through the c section that turns into a blood bath. What would Edward do? Would he stay and live a world without Bella or die with her. Who would take care of the baby girl.