The average weight for a 2 month baby is 5.5kg, so even at your baby son's corrected weight he is still far below his expected weight. So he has a significant feeding problem.It would be best to feed him on a special formula such as Similac Advance, but I am concerned about the multiple problems you are having in feeding your baby and his constipation.He really needs to be seen by a paediatrician initially and then you should be advised and your baby regularly followed up by your nearest baby clinic.
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