Board Thread:General Discussion/@comment-1713281-20140523065821/@comment-1440333-20140527103020

Spencerz wrote: Garhdo wrote: There was also ten years between First Class and DoFP - enough time for Mystique to have Nightcrawler by Azazel.

Not really. The Bent Bullet Report, one of the tie-in websites giving backstory to the universe, states that Azazel was killed in July 1963, less than a year after the end of First Class

Which means potentially she could have been pregnant by then, and perhaps even gave up Nightcrawler due to Azazel's death. It seems hinted in the film that she targets Trask after learning of Trask's responsibility in Azazel's death.