I know it’s normal for a baby not to sit unsupported until as late as 9 months! But generally speaking most babies sit at 6 months so how long should that be for?

My son is 7 months on 11th Feb and is currently sitting up unsupported (straight back and not resting on hands) for a minute or two. Does this sound average?

As if you hadn’t guessed, an over-anxious first time mum!!