My baby is preterm n he was affected by jaundice bcz of rh incompatibility.now he is 6 months.he is responding his brother voice bt not my voice is there any problem? What 6 month baby l do?he is looking at fan n communicating even he is communicating with us.is it normal? Sumtims he s laughing looking at wall n i dnt knw y he is laughing.i need to know how the baby l communicate during this time at 6 months.he s having slight squint eyes bt power n everything was normal I checked.still the head was not stable.bt he s grasping the object very well n communicating with us very well.plz clarify.he is 35 weeks + 6 days preterm baby.thank you