My baby is 2 months 5 days old, he hasnt started giving social smiles.. he makes eye contact , follow objects whenevrr we take rattle left to right or vice versa. He listens whatever we talk to him, and doesnt give any reaction , just stares us.. otherwise he is active when we put him in his play gym as he reacts to toys and makes cooing sounds .. he was born at 36 plus 5 days and didnt require any nicu time, and his birth weight was 3.4 kgs.. he is on breastfeed only and his current weight now is 5.2 kgs