sir, my baby birth weight is 2.00kg but now he is 50days old weight is now 2.510kg how to increase is weight?

A. hello in the first month after the baby's birth you cannot expect much weight gain as baby's birth weight will reduce first and then will start increasing and then on if baby is gaining a minimum of 600 gram 800 grams for month and it is a good weight gain and make sure to exclusively breastfeeding baby or give infant formula milk and nothing else