"Breast-feeding may prevent weight problems - study 
"CHICAGO (Reuters) - The longer white infants from low-income families are breast-fed, the less likely they will be overweight as young children, researchers said on Monday. The study of more than 177,000 children from low-income families who visited U.S. public health clinics between 1988 and 1992 found that formula-fed infants and babies breast-fed for less than a month were more likely to develop weight problems by age 4 than infants breast-fed for longer periods."