Oh and for babies in utero, they don't breathe with their lungs! If they did all they'd breath is amneotic fluid. A feotus gets its oxygen along with everything else--- through the umbilical cord. Fetal alcohol syndrome and the low birth weight of babies from moms that smoke tobacco products are curtesy of the chemicals supplied from those drugs (nicotine and alcohol). Before you blast a pregnant woman do your research.

If you don't even know how a baby developes in utero, you really can't make judgement.