Search the forums, there are a fair few threads about this, including my own story. When mum had me, I was born 9 days post dates, turned the day before I was born. Another BB member had the same story when she was born. If I was born in this time, I would have been a bit over 3 weeks early. I think most babies know what they are doing... you just have to get through the 'rules' these days.

Acupuncture, Breech Birth Woman Wise, Spinning Babies, time... all great resources and help.