#AskTheExpert hello doctor my second child is of 20days old. her birth weight is 2.58kg. discharge time her weight was 2.4. now she is 20days old and her weight is 2.7kg. people say she is under weight and by now she must have gained above 3kg. she is on breastfed . is this normal. she is active and her urine and poop are normal . am worried on her weight. she is not taking formula milk.