In the *Voyager* episode [The Q and the Grey](http://en.memory-alpha.org/wiki/The_Q_and_the_Grey_%28episode%29), Q wants to have a child with Janeway because there hasn't been a new Q in billions of years and he wants to mix up the Continuum (to save it). But this statement would seem to over look Amanda Rogers from [True Q](http://en.memory-alpha.org/wiki/True_Q_%28episode%29) (TNG).

Is there a canon explanation for this conflict of facts, or was this merely an oversight on the part of the writers?