Does anyone know anything about very large babies and early weight loss? Baby is 4 weeks, weighed 11lb (4.9kg) at birth. Mother said he was rather puffy looking, especially around the face. He was not weighed again until today and now appears to be 10oz (300gm) below birthweight (note: different scales). No diabetes, no medical problems. Fully breastfed. Numerous wet nappies, bowel movements nearly every nappy change. Appears to be feeding well although spends up to an hour on the breast, settles well between feeds, sleeps with mother and feeds every couple of hours but she is not sure for how long as she dozes off. Nipples fine, supply seems good. She is now under notice to get his weight up or supplement. Is there anything documented, or does anyone have experience with this? My hunch is that he was born full of fluid, for whatever reason, which he has been shedding. How long might this go on for? Should he be gaining again by now? Of course we don't know where his weight has been over the past four weeks. Mother says he looks a little thinner and not so puffy around the face. My 10+ pounder regained his birthweight by day 4, but he never looked what I would call puffy.