sitting & crawling

Created by
Updated on Apr 06, 2018
Hi.. my baby is 7 month old.. she is still not trying to crawl or sit by herself.. when we make her sit she hold the position for very long also pick the toys around her.. she start rolling over from back to tummy from3 n half months and tummy to back in 5 months.. but from then she still not trying to sit or crawl.. also crawl on tummy in circular motion and backward direction from 5. 5 months.. not trying on knee or atleast on tummy in forward direction what is the problem.. is mattress plays any role in this.. if yes please suggest specific name..
