SammieJane - I think there are a few women on here that have TT from birth.
When DH and I lived in China we realised that most families over there do from birth as well basically using estimations on when the bub might need to go then using an association like a whistle sound.
Now that is environmentally friendly! LOL.
I think more and more families there use nappies now though. Its funny how culture changes.