J.P.
I was always worried about weight gain and if my little girl was gaining enough. I was told by a lactation nurse that they should gain about an once a day but no less than 1/2 an once a day. I had been to the doctor for a couple of weight checks and every time we went they charged us. Plano Pres. has a gift shop I think called A Mother's Gift and you can get weight checks for free. If they aren't busy with appointments a lactation nurse will talk to you. Also, if you don't already have one get the pumping bra. They sell them at the gift shop to. Life saver!!!! Good luck!