Catechesis: The Person of Christ

On account of this personal union and communion of the natures, Mary, the most bleed Virgin, did not bear a mere man. But, as the angel Gabriel testifies, she bore a man who is truly the Son of the most high God. He showed His divine majesty even in His mother's womb, because He was born of a virgin, without violating her virginity. Therefore, she is truly the mother of God and yet has remained a virgin.—FC SD VIII:24