hello my son was born perterm 35 weeks weight 1.6 kg on September 26 now he is 4.5 kg is it ok

A. Awesome wait your child has gate that is what I can tell you with a minimum gain of 500 g in a month we say it’s a healthy weight gain and look at the current weight and the birth weight of the child I would say your child is gaining exceptionally well it’s very good