my baby is 3 months old.. she has not done poop from last 9 days... is this the matter of concern?

A. that's a little long if he is exclusively breastfed then constipation is rare. he will pass stools eventually. do tummy time, cycling motion of legs, do burp properly. if child becomes irritable , not feeding well , then consult your paediatrician. formula fed babies may have constipation. so watch for consistency of stools as well.