Growth spurts are amazing - my son (now 17) had them as a baby and is still having them. He can actually pinpont now where his "growing pains" are. He was three weekd premature and was 21 inches long and 5.6 lbs at birth. We came within 24 hours of him being stillborn (long story....). HOwever he is now 6 feet 1 inch and still growing. Remarkably healthy and we are blessed. It was easier when he could begin to tell us when his pains were and where - mostly joints and the longer bones inthe shin area.