There is a situation in which we believe a baby is born above or below their genetically-determined best birth weight, and it corrects itself. Of course this is a dangerous area to play in, because one could say (falsely) that all babies who fell off the curve belonged in this category. Still, if he was so unusually large to begin with (you say the mother did not have gestational diabetes?), and he is now closer to "average," one would want to chart his weight changes since birth to see what is happening now. Is he gaining at a good rate? Has he plateaued, or is he losing? The picture of what he's doing now will shed light on this situation which just looking at the birthweight may not do. The abundance of output is certainly a good sign, although I had a mother once whose baby had tons of output and failed to thrive because of an overdosage of pituitary medicine (given to the baby to compensate for an inherited defect). The physician had trouble believing the medicine, and not the breastmilk, was at fault until we weighed the input (baby pre- and post-feeds) and the output (all those weight and poopy diapers--and there were upwards of 14 soaking wet diapers a day in this newborn!) The baby began to gain weight once the medication dosage was adjusted. One wonders also if any factors in the terminal phase of pregnancy (for instance, labor meds) could have caused a temporary weight gain (since you are considering edema). Maybe someone more knowledgeable can address this question? Arly [log in to unmask] (Arly Helm, MS, CLE, IBCLC)