L.M.
Hi, Rhonda! I'm responding to your question because I also have a child whose weight I'm always concerned about. Your question could have been my own. I just wanted to share with you something I read in a magazine recently, and that is: A better way to track if your child is overweight (rather than the scale) is to measure her height and waist. If her waist measurement is more than half her height, you could consider her overweight.
Personally, I feel that MANY things have to be considered that the doctors don't take into consideration, such as bone structure, genetics, and birth weight. (My son was 10 lbs 4 oz!) As a mom, you know if your daughter is eating healthy foods (try journaling her food... sometimes it's surprising how much they eat without either of you realizing it) and if she's getting enough physical activity.
P.S. Amazingly enough, fruit juice, which we all tend to think is so good for them, can really pack on the pounds!