Hi Jacqui

EPO can help also sex. There is a hormone in seamen that can help to bring on labour. Orgasm, a womans orgasm can also stimulate labour. But basically the baby will not want to come out until it is ready.
Other things that may help is exercise, and staying upright as much as possable. This does not mean that you have to stand all the time. But instead of lying on the lounge sit on it, that sort of thing.

Not sure what Kelly's article has in it, I have nor seen that one but I know that other articles on this site have lots of good info so I'm sure it is worth a look.

Hope this helps