I am flitting between not being worried at all and being worried. DD is 7mo and has pretty much done everything early, rolling over at 10 weeks, calling me mum and pointing at 4 months and so I guess I'm used to her doing things early. So far she's not showing any interest in sitting up, she can sit supported and she has a play ring in which she its up in and she also sits between my legs (with her back to me) and about 50% of the time will actually sit without any support for about 5 seconds until she realises. I suspect she needs the reassurance that someone is there if she falls over but if I put her in sitting position with nothing behind her then she will point blank refuse and will lay herself down. So I know she can do it which is why part of me isn't worried. However DH's mum had spina bifida and (to be fair I know very little about it) am worried a bit that maybe DD has some sort of problem with her back. I feel silly even saying that now because like I said she is sitting on occassion. I was really wondering if there was anyone else out there whoes LO's weren't sitting unsupported at 7mo.