My baby is of 2 months old and its born weight is 3.1 what weight he should have at 2 months complete

A. actually you cannot see any kind of weight gain in the baby in the very first Monday will lose the weight then they will start increasing around 500 gram to KG per month also completed depends on your pool intake because as a breastfeeding mother your food intake matters a lot because it comes in the form of breast milk to your baby