Mamas-to-be who plan on scheduling their babe's birth [1] to coincide with a special day or one that is convenient need to think again. A new study of American births [2] shows that babies do best when they debut no earlier than seven days before their due date. Even a few days can make a difference in the child's lung development. One report said [3]:

The rate of Caesarean sections in the United States is at an all-time high, accounting for about 31 percent of births. There are lots of reasons: older moms, multiple births, the threat of malpractice lawsuits, the preference of mothers and doctors and the risks of having a vaginal birth after a previous Caesarean.

Other complications of infants born at 37 weeks included infections and low blood sugar.

Source [4]