** FILE ** In this June 25, 2012, file photo, a family nurse practitioner, right, examines a newborn girl accompanied by her mother in Portland, Ore. After falling four years in a row, U.S. births may finally be leveling off. (AP Photo/Rick Bowmer, File)

Photo by: Rick Bowmer

** FILE ** In this June 25, 2012, file photo, a family nurse practitioner, right, examines a newborn girl accompanied by her mother in Portland, Ore. After falling four years in a row, U.S. births may finally be leveling off. (AP Photo/Rick Bowmer, File)