For Wolfriders and any other "mortal" elves, I would say yes there is the possibility that the females become barren after a long while. However, for immortal ones, look at Toorah and Anatim - Sun Toucher... they recognized twice "after being friends for so very long" - I think they both thought they were 'too old' for it to happen to them, but then there they are. And not just for Leetah to be born, but her sister many many years later. Obviously they and Moonshade/Strongbow are examples of Recognition "knowing".
Since both Leetah and her sister Shenshen played important roles in the progress toward the stars, I have to then imagine that Chitter will too, or play a role with the Wolfriders, since Dart also has been quite important to them.
But I'm almost certain that for any truly immortal elf, age doesn't matter.