Recent Thought on Bella's Transition

So, we all know that Bella is basically a supervamp, as far as not having an insane newborn phase as most do.

There have been a few theories about this. It seems hinted that she was "good" at being a vampire because she knew so much about the transition process and understood the side effects and the different lifestyle choices.

Recently, I considered something else. What if her waking up "tame" has something to do with her being pregnant and being changed basically at the moment of birth?

The entire pregnancy she was dead set on making sure the baby was born and she was reborn. Normal pregnancy hormones are insane - imagine them at the quickly elevating levels Bella must have been experiencing.

She "died" holding on to the hope that she could reawaken and have a happy little family with Edward and the baby.

Could extreme hormones and maternal instinct help make a more "tame" newborn?