Yay, Apogee agrees with me.
Immortal elves in other universes (Tolkien, celtic mythology, etc) have been able to have children at an age considered old even for elves in that universe. Generally, it seems fantasy creatures in the immortal category do not get anything like the human menopause. Usually there is some reason they don't have too many children - if immortal creatures had babies as often as humans, the world they live on would be crowded. I've read stories of angels having babies, and angels are considered older than the universe.
Generally it seems to me fantasy creatures of the immortal kind should not be assumed to resemble humans biologically in any way not specified by the person who invented them.
Kathleen once wrote a fanfic of Voll and Savah Recognizing. It was very cute.