we can improve his condition by 1, physiotherapy 2, special training and care 3, high protein diet 4, should allow to play with other kids. we should support him emotionally also.. stem cell therapy can prevent some complications but it is under research trails.. try to give regular physiotherapy and speech therapy.. and get his eye examination every 6 months, bcos most of the development delay kids will have vision problems which they cannot express and get unnoticed by parents. try to give omega fatty acids and multivitamin daily.. use tablet.. baclofen daily to prevent joint contracture