Catena Aurea on Luke 2:22–25: Ambrose of Milan

For no union with man disclosed the secrets of the virgin’s womb, but the Holy Spirit infused the immaculate seed into an inviolate womb. He then who sanctified another womb in order that a prophet should be born, He it is who has opened the womb of His own mother, that the Immaculate should come forth. By the words opening the womb, he speaks of birth after the usual manner, not that the sacred abode of the virgin’s womb, which our Lord in entering sanctified, should now be thought by His proceeding forth from it to be deprived of its virginity.