I've sometimes wondered if that saying is evidence based as well. It hasn't stopped me from being guided by it though, and I love feeding on demand.

Shayla was a pretty chubby bub to begin with. Her weight started out just above the 75th percentile for quite a while. Since crawling and now walking (running!) her weight has dropped off dramatically. In fact, she had her nurse checkup today and while her head circumference is still in the 75th percentile, and her length is still the 50th percentile, her weight is actually now in the 25th percentile. The nurse questioned it a little and wants to check it again in a couple of months, but I'm not worried at all because she is still breastfed and also eats like a horse through the day, lol! She's just an active growing little girl!