China has been in the news for tainted formula and tainted baby food. With tainted US products coming out of China not such a distant memory, why even risk the health of a newborn?
US formula has been recalled as dangerous many times as has baby food.
Mothers milk is free, pre-warmed, sterile, always available and as pure as the mother's diet. Even if the mother's diet and environment are less than optimal, her milk may contain trace amounts...not poisons in amounts that will sicken and kill her baby.