my 59 days old baby girl's birth weight was 2.85 kg. currently her weight is 3.6 kg. please tell me if she is underweight? if yes? what should be done?

A. dear mumma you can have a rough idea that by 6 month your baby's weight should be double the birth weight and you should also know the fact that weight gain is very gradual so there is nothing to get over it only you need to focus that your child is taking feed at regular intervals as well as passing motion and urine frequently