>>16287472if the baby raises its head above the water and breaths for the first time valves in the heart will perminantly shut off and normal human breathing begins and oxygenation from moms uterus wont help it anymore. So if it breathed and then went back down it will drown like any other human. Im not sure how opening mouth and getting water in instead of amniotic fluid would change things but it seems very risky because if theres any complications theres no doctors to help