Did your baby ever breathe fast when he/she was a newborn?
At this age, a baby's metabolism is very high, which requires the rapid movement of oxygen into the body and of carbon dioxide out. To make this happen, a newborn typically breathes 30 to 60 times a minute, compared to an adult's 12 to 20. Why the high metabolism? "They're growing like crazy," says Jason Homme, a pediatrician at the Mayo Clinic in Rochester, Minnesota. "Babies will often triple in weight during the first year. It's the fastest period of growth in a person's life."