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Do Bigger Babies Become Fatter Adults?

Rapid Early Weight Gain May Predict Obesity
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WebMD Health News

Oct. 13, 2005 -- Chubbiness is generally considered to be a sign of good health in babies, but it may also be a warning sign for obesity later in life, say researchers in the U.K.

They report that big babies and those who gain the most weight during the first two years of life appear to have an increased risk for being overweight later in childhood and beyond.

The researchers based this conclusion on a review of 24 studies that examined the relationship between early weight gain and later obesity.

The review is reported in the Oct. 13 edition of the British Medical Journal.

"There are a whole range of factors that influence infant growth," researcher Janis Baird, MD, PhD, tells WebMD. "Our finding suggests that these factors are also important in influencing the risk of later obesity."

Experts Unconvinced

While weight gain among infants and toddlers may be linked to weight issues later on, pediatric obesity experts who spoke to WebMD say the association is far from proven.

The review did not consider birth weight or weight gain among babies of low birth weight. Studies that have examined these factors as predictors of weight later in life have been conflicting.

"I think we still have a lot to learn about how early weight gain affects later weight," University of Colorado professor of pediatrics Nancy Krebs, MD, says.

Pediatric cardiologist Reginald Washington, MD, is Krebs' co-chairman on the American Academy of Pediatrics' Task Force on Obesity.

Even if heavier babies are at greater risk for becoming heavy adults, Washington says that does not mean that a skinny baby will become a skinny adult or a fat baby will become a fat adult.

"Interventions may turn out to be important, but we may be talking about things as simple as breastfeeding instead of bottle feeding or making sensible recommendations to parents about how they feed their young children," Baird says.

Genes Are Important

Krebs says the biggest predictor of whether a chubby baby will become an overweight child is his parents' weight.

"As a physician, if I see an infant or toddler becoming overweight I judge how worried I need to be by looking at the parent," she says.

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