my baby is 45 days old and has 3.2kg weight is it about to worry because in 1 month he has gained only 500grams after 15 days of birth he had 2.7kg weight has he had jaundice

A. Yes but 500 g minimum is the right weight gain that is expected for a child to have and maximum a bit can go to 1 kg so you can relax on that as a child is gaining appropriate amount of weight in a month so need not worry about it