Thank you all for the interesting answers.
We don't know how long Adam and Eve lived in the Garden before being expelled but we know that there was no procreation and this also includes the rest of creation, otherwise there would be many immortal beings out there. I particularly liked Iaronius' answer, when he said that probably Adam and Eve still did not show physical attraction between them.
In short, the most sensible answer to this question is that we don't know. Anyway, thanks.