Talk:Arwen
From Tolkien Gateway
Portrayal in Adaptations
The point is made in here that Arwen turns back for Rivendell after seeing a vision of her future child, but that this is unlikely to have been a major surprise to her. I always took this as a reference to the idea that elves had fewer children than humans, so it was not automatic that Arwen should bear a child at all in her lifetime. I know that LOTR and Silmarillion mention the relative fertility somewhere, can't remember where right now!
