Board Thread:Questions and Answers/@comment-5729782-20121111105405/@comment-5674726-20121117172705

''It would be an interesting twist to make Gwen's infertility based on what Morgana did to her, or God forbid, the remedy of her brainwashing by Merlin. I do want to see how Arthur and Camelot react to their not being able to have children. Who would he appoint as his successor? Would they claim a child as their own even though they did not conceive it? Would Arthur choose to seek out a birth mother for his heir? How would that affect Guinivere?''

Arthur and Guinevere must have been married for close to four years by now, without any sign of a child. Any fertility issues may be natural rather than the result of anything Morgana or Merlin might do to affect her ability to bear children, intentionally or otherwise. I don't know if they have the time to fit in a full-fledged subplot about a succession crisis, pressure on Arthur to set Guinevere aside on the grounds of barrenness and remarry, etc, but maybe they could allude to the issue by showing the Council to be especially worried about Arthur taking part in missions that put his life at risk given that he has no heir.

It'd be interesting if it turns out that it's not Guinevere who is infertile, but Arthur. It could be a consequence of the circumstances of his birth or something.