It is a very difficult decision deciding who should live, mother or baby. In most cases, we would hope that there is more information available, especially about both parties health risks, etc. In a situation where all else is equal, I feel like the mother should survive over the baby. The only reason I say this, is that in the case where the mother does not survive, the baby may not have a proper caretaker.
The mother should live I think always, the mother life is precious and so is the baby life, but the mother can always have another baby, unfortunally once the mother life is gone its gone, and so I think the mother life should be saved in any circumstance unfortunally my opinoion