We have six children and they are nurtured, cared and nourished by my wife. I have noticed from her that everytime our children are crying while they're still baby she never let it passed. She gave up her and attained to our crying child. But I notice from the nursery, the babies are left crying for several minutes. I was once asked an attendant why the baby is left crying for a long time. She said it is good for the baby to cry to aid their breathing. Is she right? What do you think?