Hello doctor My baby is 7 and half months old and she has not sat up on her own till now.. when we keep her in sitting position she will sit and play for a while holding toys with both hands but is wobbly and we still have to give her back support while holding her.. she turned over at 3 months and she is moving around (rolling both directions, getting up on all four, grabbing things, clapping) Weight is 6.6 kg now (bw-2.75) Is this ok? Also what can I feed her to gain some weight..? Thank you..