Borg's right, I'm sure, but I have also noticed that my kids become trainee doctors (and it's the only occupation I have found so far that will say that--in other words, I don't have a clue how to make them trainee builders or farmers, etc. not that it's not possible, I just haven't figured out how) and once they are 14, it really easy to make them adept doctors. But trying to get an adept doctor to progress without interference, seems pretty difficult to me.