Unfortunately you do not mention just how premature your son was because this is very important when it comes to important milestones like sitting. Most babies will sit by about 6 months but many only start at 7 months.8 months is rather delayed especially as he shows no signs that he will be starting to sit soon, but we really need to correct his age for his prematurity. You are welcome to write to me again with the information about how premature your baby son was at birth.
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