Paragraph 2. "CONCEIVED BY THE POWER OF THE HOLY SPIRIT AND BORN OF THE VIRGIN MARY"
Catechism number 488
"God sent forth his Son", but to prepare a body for him,125 he wanted the free co-operation of a creature. For this, from all eternity God chose for the mother of his Son a daughter of Israel, a young Jewish woman of Nazareth in Galilee, "a virgin betrothed to a man whose name was Joseph, of the house of David; and the virgin's name was Mary":126