What should be ideal weight for pre mature baby of 3 month old?Mine was born at 32 weeks with 1.150 kg and now he is 3 month old with 4 kg weight, is this growth good or bad?

A. Very good growth your child has approximately gained 1 KG every month I’m saying approximately so this is very good normal reading somewhere on 4 to 500 g on an average so your child is doing much better than that so this is going very well