Elena Nieves (L), who is pregnant, gets instruction from Exercise Physiologist Lindsey Hanna at Northwestern Memorial Hospital in Chicago February 27, 2009

 
Elena Nieves (L), who is pregnant, gets instruction from Exercise Physiologist Lindsey Hanna at Northwestern Memorial Hospital in Chicago February 27, 2009
Elena Nieves (L), who is pregnant, gets instruction from Exercise Physiologist Lindsey Hanna at Northwestern Memorial Hospital in Chicago February 27, 2009. Nieves is the newest member of an experimental program at Northwestern Memorial Hospital designed to keep their weight in check. It is based on new research suggesting that excessive weight gain in pregnancy hurts both the mother and her fetus, raising the risk of complications during pregnancy and putting the child at risk of obesity and diabetes later in life. REUTERS/John Gress
Tags: Obesity