CCC 973
Profession of Faith›SECTION TWO I. THE CREEDS›CHAPTER THREE I BELIEVE IN THE HOLY SPIRIT›Paragraph 6. MARY - MOTHER OF CHRIST, MOTHER OF THE CHURCH
By pronouncing her "fiat" at the Annunciation and giving her consent to the Incarnation, Mary was al ready collaborating with the whole work her Son was to accomplish. She is mother wherever he is Savior and head of the Mystical Body.