User blog comment:Cullen's are HOT!!!/Renesmee and Jacob (Question)/@comment-2069500-20111213004452

This is one of the most disputed questions regarding the entire Saga, simply because the decision to have Renesmee and for Jacob to imprint on her are neither sound nor supported by any rationality.

Basically, here are the facts:

A) Renesmee is part human, part vampire.

B) Renesmee has an accelerated mind and body.

C) She ceases to change or grow older (otherwise known as Vampire Syndrome) around age seven.

D) Rosalie is very protective over Renesmee and sees her as a baby, child, and her young niece.

So, given these facts, I believe Renesmee has a small window of maybe three years (assuming she reaches a level of puberty before she is isolated in a teenager's body) in which reproducing is possible. After those years, she cannot change form (as I can tell) and so therefore meets the same issue Rosalie, Alice, Esme, and other female vampires face.

That being said, if (this is a big if) Rosalie, Edward, and/or Bella don't like the idea of their technically child daughter (niece in Rosalie's case) engaging in any kind of intimacy, then I do not believe she will have children.

If she did, they would be 2/4 human, 1/4 vampire, and 1/4 shapeshifter. Of course, I'm assuming that because both parents have the human traits compared to single vampire/shapeshifter traits... By my figures, the shapeshifter trait is dominant and vampire traits aren't even able to be passed on. So, the 1/4 vampire is about 85% certain to not crop up because such traits are acquired. If they could be passed on, it would only be slight.

The offspring would probably have some sort of sporadic shifting cycle, probably uncontrollable and very weak. They may have a tougher immune system, on the other hand. Depends on probability.