my baby is preterm 35 week and now his weight is 4 kg ..birth weight was 1.6 kg ..now 5 month going on bt till now baby dnt start rolling and not able to hold neck

A. Weight of your child as per the birth of the child is good and rollover can happen between the age of 3 to 9 months also since your child is pretty mature you can expect a delay of a month or so in the expected milestone growth of your child