Dr. Harvey Karp, in his book The Happiest Baby on the Block, explains that babies are actually born about three months earlier than they should be. If they stayed in the womb any longer, their heads would be too big to pass through the birth canal, and their bodies too large for the mother to carry. That's why the first few months of life are sometimes called the “fourth trimester.” During this time, our job is to create an environment that feels as close as possible to the w