The rate of C-section births in the United States has been increasing every year since 1996 for women of all ages and racial and ethnic groups, and now the procedure is the most common operation in the country. In 2007 alone, 1.4 million Caesareans were performed, representing 32 percent of all births. However, although C-sections can be life-saving in some instances, experts are concerned with the ever-increasing number of the procedures, reports Denise Grady of the New York Times.