my girl is 3 weeks old and we're struggling with weight gain she is still not back up 2 her birth weight. she was born 4.15 and when she was 5 days old she was down to four pounds at two weeks she was 4.12 and now at 3 weeks she is still 4.12. :-( we're trying to add more calories to my breast milk by putting it in a little bit of formula to see if that helps this week she goes in next week for another weight check.... my biggest fear as they're going to tell me something's wrong and that's why she's not gaining weight. when I was pregnant with her they found fluid in the brain and I had to get an MRI on her brain while she was still at me. they still don't know what the fluid is so we're just keeping an eye on it and waiting for something to happen.... please just keep her in your prayers and let's hope for the best