I don't know whether this is the right place to post or not, but I thought at least I might get the benefit of other people's experiences / advice.
My ds is 11 months old and is still not really able to sit. He will sit momentarily (sometimes for up to 2 minutes) if really focused playing with a toy in front of him, but most of the time after a few seconds he falls backwards. He has a very large, heavy head which seems to pull him back. He hates being on his stomach and rolls over if I try to give him tummy time. Basically, he just likes being on his back. He moves around on his back by using his legs to propel him.
I am very reluctant to seek health professionals' opinions because...I don't know really. I feel there's nothing wrong with him in any other area. He seems bright and happy, understands a lot, can clap, wave etc. What do you think? He is 2 months outside the "norm" so I am getting a bit concerned. Thanks