Hmm...I think it's been established by Wendy that elf-women do undergo a process akin to human female menopause. I'm sure that I've read statements by the authors to that effect in an interview, though which one escapes me. The only question, I suppose, is whether this is a biological process that both Wolfriders and immortals go through. If Wolfriders only, it would make sense, since their biology is part wolf. Are there any certain examples we have of immortal elves having offspring well over, say, 5000 years? I always got the impression that Clearbrook's statement was alluding to a form of menopause, not a health issue. And as stated before, I'm sure that Wendy has confirmed this somewhere.