C.H.
S.,
I wouldn't worry about it at all. My daughter is 9 months old and weighs 24 pounds. At 6 months she was 20 pounds. Once you daughter starts crawling she will start butning more calories. I wouldn't worry at all. My two older children were the same way as infants. My son was 21 pounds at 6 months and my older daughter was 20 pounds and they are both at a "normal" weight at 5 and 7. My son is actually on the small side. Personally I think "chubby" babies are happier and they look healthier.