I have heard of a few studies being done about this and in particular it came down to where you live, this was way back when ds was born so I have no idea what it was called or anything. I think everyone and every pg is different though, you think of all the differences in pg and how people are cared for etc.

But I am with you on hoping for early rather than late. I'm starting my raspberry leaf tea at 34wks, lots of walking, squating everything. Fingers crossed for a Feb baby!