SDI Productions/Getty Images If you’ve ever taken your child to a maternal, child and family health nurse for a growth check, you might have felt a mix of curiosity and anxiety. As health professionals, we’re often asked: is my baby gaining enough weight? Am I feeding enough? Why did they drop a percentile? Why is my friend’s baby bigger than mine? Am I doing something wrong? In most cases, the answer is that there is nothing wrong at all. Let’s look at what the measurements actually mean and w