DD nearly 9 months, had 8 month check yesterday and blasted HV said that she should be standing by now. She holds her legs out when you hold her up! She doesn't crawl but is doing some bum shuffling, which I know means that she will probably walk late. DD is 91st percentile in weight and 98th in height so I think her poor legs and arms can't support her. HV said she would phone in a couple of months to check whether she could stand. DD sat up on her own at 5 months and started to say a few words at 8 months so I doubt if there is anything wrong.
I think she thinks she is 4 handed as she uses her feet as hands often.