How much weight gain should a new born have every month?? My baby boy was 2.7 during birth,how much should he be after a month?? I am worried pls help

A. hello baby gaining a minimum of 600 gram to 800 gram per month is a good weight gain and absolutely nothing to worry just make sure the babies getting sufficient BM and in case not sufficient you can give infant formula milk stage 1 using a b p a free bottle like babyhug