My daughter was 7lbs 6oz at birth and she was only 8lbs 3oz at one month. She has been on the small side 25th or less percentile since then. All kids grow and develop at different rates. My friends little girl is 2 days younger than mine, and was the same weight at birth, but is now 4lbs heavier and 2 inches taler. As long as his Dr. isn't concerned I wouldn't worry...and if he is still in the normal range for his age (which it sounds like he is).
at 9:52 PM on Nov. 24, 2010