So how do doctors figure out whether kids' height and weight measurements are "healthy"? Whether they're developing on track? Whether any medical problems are affecting growth? Doctors use growth ...

Despite data collected for growth charts, "normal" heights and weights are difficult to define. Shorter parents, for instance, tend to have shorter kids, whereas taller parents tend to have taller ...

If a child's weight, height, or head size is below the 5th ... is always so smooth and perfect like the lines of the chart. Kids bounce up and down the growth charts, depending on appetite ...