my baby js not gaining weight during birth he weight was 2.4kgs now 4 month's old weight is 5 kg is it normal

A. Your child has doubled the birthweight by completing the age of four months you cannot expect a better weight again than this see by completing the age of four months or child should be somewhere around 2 kg more your child is 2600 g more than the birthweight so it’s a very healthy weight gain for your child