In this photo taken Oct. 3, 2011, Dr. Claire McCarthy looks down as an infant’s growth is measured during a check-up at Children’s Hospital Boston. A new study by researchers there

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In this photo taken Oct. 3, 2011, Dr. Claire McCarthy looks down as an infant’s growth is measured during a check-up at Children’s Hospital Boston. A new study by researchers there says babies who progress past at least two percentiles in weight and length on growth charts are at risk for obesity later in childhood. (AP Photo/Children's Hospital Boston) less