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And then there are those who choke or vomit, become afraid of that, or have always been picky eaters and fall off their growth curve.

The country's once-promising growth curve has dipped and graver challenges loom in the low-lying delta that is vulnerable to climate change.

They were referred by Emmie’s pediatrician because she was gaining weight rapidly; her B.M.I. was pulling upward away from her growth curve on the C.D.C.’s B.M.I. chart.

Incremental legislative actions at the state or federal level have already influenced the data and have been factored into the growth curve estimation.

"We are seeing the growth curve rise very quickly. Projections are pessimistic if we do nothing," he said, although he acknowledged that at least awareness of the issue was growing.