Breast-Feeding Past Two Months Lowers Obesity Risk

December 26, 2014 Updated: December 26, 2014

Infants at risk for childhood and adult obesity have a better chance of not becoming overweight if they are breast-fed longer than two months.

“Children at the highest risk for rising weight gain patterns in infancy appear to benefit the most from longer breast-feeding duration,” says Stacy J. Carling, a doctoral student in nutritional sciences at Cornell University.

“Infants who breast-fed for two months or less were 2.5 times more likely to add weight rapidly, compared to similarly high-risk children who breast-fed longer.”

Excessive weight gain in infancy has been linked with obesity later in life, and there are several well-known risk factors for that, Carling says. “Our study is the first to show that stopping breast-feeding too soon tips the scale for at-risk children.”

Published in the journal Pediatrics, the two-year study tracked 595 children in a health care system in central New York, asking mothers to fill out questionnaires and give access to the children’s medical records.

Weight gain by the maturing infants was followed with their weight-for-length/height “z scores,” a standard measure used by the World Health Organization to detect malnutrition in children not gaining enough weight as their bodies lengthen.

Risk factors for subsequent childhood obesity on the mothers’ part included maternal BMI (body mass index), education, gestational weight gain, food insecurity, smoking during pregnancy, postpartum stress, and lack of social support.

In the final analysis, maternal BMI, education, and smoking during pregnancy were the only factors associated with an infant’s weight-gain trajectory.

“Now we can add short-duration breast-feeding to the list,” Carling says.

“Breast-feeding may protect against elevated infant weight gain—with better appetite control and lower protein intake—compared to formula-fed babies.”

The findings should “aid in the identification of infants at high risk for obesity, … targeting mothers of high-risk infants for breast-feeding promotion and support may prove protective against overweight and obesity during a critical window of development, when such efforts are most effective,” the authors write.

From Cornell University via Futurity.org