Ambrose of Milan — as excerpted in the Catena Aurea on Luke 1:39-45

“She who had hid herself because she conceived a son, began to glory that she carried in her womb a prophet, and she who had before blushed, now gives her blessing; as it follows, And she spake out with a loud voice, Blessed art thou among women. With a loud voice she exclaimed when she perceived the Lord’s coming, for she believed it to be a holy birth. But she says, Blessed art thou among women. For none was ever partaker of such grace or could be, since of the one Divine seed, there is one only parent.”