Personally I don't have a solid enough grasp on scripture off the top of my head; I do think there is a discussion to be had (and maybe other, more qualified people than I have already had it) on the metaphysics of the conception of Christ. I don't disagree that there is a significance to Mary, the fact that she was chosen to be the worldly mother of the carnation of Christ, but within scripture itself, I don't think there is anything that would elevate her above any number of other unique figures contained within the biblical narrative.