Now unless one believes that a woman in the physical world can conceive whilst remaining a virgin, one must look elsewhere for the meaning of her conception, because as the story goes,
"The Holy Spirit will come upon you, and the power of the Most High will cover you with its shadow." [One might add that Joseph was not going to be involved.]
Here is biblical confirmation that Mary's pregnancy is not of the physical kind, any more than the pregnancies of Demeter or Ceres or any other fertility goddess was of the physical kind. Indeed, I have my doubts even about the existence of Mary, except as a literary figure, an armature on which to construct a myth, a story of a creation within the human psyche.
Clearly, Mary had no choice in the matter. She was there, not to create life, but to carry life. I say again, she had no choice.
"Let it happen to me as you [the archangel Gabriel] have said."
For me, that statement speaks of submission and the complete absence of psychological denial. Therein lies the spiritual strength of Mary, that symbol of inner creation in the fertile soil of the spirit. What was to come was, what some have called, the 'Inner Christ', the true/authentic/real/higher self. Now whether our Christic Selves were always there but covered in an egoistic shroud, I am uncertain. Maybe there was a point in history when we evolved to a state when we could, if we so chose, break free from the dominion of the ego. Mary's wisdom lay in her acknowledgement of, and submission to, that psycho-spiritual evolution.