what is average weight and height actually before born baby 2.3kg at present how much present age

A. For a premature child it is expected to be 350 g minimum gain in a month so if I evaluate on that it should be 2650 g as of now to maximum we expected to be 500 g in this age it can be more than that but if you know the chair contains 500 g in a month it’s good and the height is based on the genetics and the birth height