My daughter is 5 months old, and the short story is, I am wondering if I should be concerned about her weight. Mind you, my son is and always has been in the 90+ percentile for weight and height, so the other end of the spectrum is new to me. So- 5 months old and she weighs 13.0 lb/5.9kg. She was a sizeable baby to begin with- 8.14lbs/3.7kg but seems to have gained little since then. I looked at the WHO growth charts (since she is breastfed) and this places her now in the 1-3 percentile. As a rule, I don't believe in putting too much weight in growth charts since they are just a generalization of the "average" baby. But her height is in the 75% and in the past 2 weeks she has dropped .7oz for unknown reasons. I hate to take her back to the doc after just 2 weeks (when she was seen two weeks ago she was in the 25%) and look like some hysterical mother but I don't want to ignore a potential problem. Just wondering what others experiences of this are and what you think. I wasn't so concerned when both her height and weight were at 50% because she just seemed to be an overall tiny baby. But now that their is such a disparity in her height and weight, I wonder if I should be concerned.