My baby girl is 53days old..her born weight was 2.9kg and current weight is 3.9kg. Is it ok? She is on formula and breast milk.. bt still not gaining sufficient weight.. please help

A. No you are having a misunderstanding with the weight gain your child is having proper weight in fact your child is having better weight because every week the child should gain 102 150 g and about 4 to 500 g in a month so in 53 days your child is already one KG up which is a healthy weight again