Every time I get Ivy weighed they seem concerned but they wont seem to say why? I don't think they are overly worried but could anyone say if she is gaining too much or too little for me because they don't say when I ask. She was 6.10 when she was born then went down to 6.7, week 2 she was at 7.1 and now week 4 shes 8.2. I think shes done really well but I'm clueless! How many oz are in a pound?Thanks x