Holly, if it makes you feel better, don't be so concerned with the growth curves. They're just averages. As long as she's healthy otherwise, she'll probably catch up late. After all, my twins stayed below the growth curve until 6-7 months, then shot up so quickly the doctors thought that something was wrong on the over growing side!! All was well though. Other than an issue with hip dysplasia that required us to go to the Shriners Hospital for many months, they were happy, healthy beautiful babies. Just like your little girl!!