My DS is 9.5 months and cannot yet sit properly unsupported. He will sit up momentarily then either flop forward or keel to the side. He sits ok in a Bumbo. He is also not babbling yet. He shouts, makes growling noises and blows raspberries but is not saying mama, dada or anything like that. He is commando crawling quite well and seems ok in other respects. Do you think I have anything to worry about?
Thank you in advance.
Pammym.