today's my baby is completed 4months ..n now her weight was 4.5kg..n Birth weight was 2.7kg....now what should I do?it is normal or not..

A. hello the baby is gaining a minimum of 600 gram to 800 gram per month it is a good weight gain and absolutely nothing to worry and not a problem and just in the case the BM is not sufficient you can alternatively give baby infant formula milk using a bpa free bottle like babyhug