doc, mera baby shouting krta h, hasta bhi h, rota bhi h, bt jb usse baat krte h to wo Sunta h smile krta h, bt huuuu huuuu nhi krta, is it normal???? kb se start krega, plzz reply

A. A 4-month-old baby is expected to: Have well-established close vision. Increase eye contact with parents and others. Have beginning hand-eye coordination. Be able to coo. Be able to laugh out loud. Anticipate feeding when able to see a bottle (if bottle-fed) Begin to show memory. Demand attention by fussing.