Are the Falmer you kill the OG betrayed?

Or do you think the Snow Elves continued to breed after they were turned? I've read almost all of the in game books from both the base anniversary edition and the LOTDB mod and couldn't find any written stories of a pregnant betrayed or even children. We see with the paladin in FV that a normal Snow Elf can live a long, long, LONG time even without vampirism or Auriel becoming involved, so could these still be the original elves, or are we to believe they're now grandchildren of the originals? Surely we must still be within the 1st few generations with a lifespan that long right?

I know game mechanics is to just respawn a dungeon after enough time passes, I'm just curious if there's an actual lore reason given at any point!