Bryan Cross over at Called to Communion has written an article explaining one of the titles given to Mary by the Church.
To read the entire article go Here:
"According to the Catholic Church, all of us who have been united to Christ by faith are called to participate in Christ’s redemption of the world, by prayer, obedience, taking up our cross, and sharing in His sufferings. Through His work of redemption, Christ graciously gives us active, contributing roles in His redemptive work, thereby allowing us to “fill up what is lacking in Christ’s afflictions.” (Col 1:24) What is lacking is not anything in the suffering of Christ as Head, but in the participation of the Body in the suffering of Christ the Head. And it is in this respect that Mary is the greatest example to us of participation in Christ’s redemption, because she did so in the deepest and most beautiful way.
Mary uniquely participates in Christ’s redemption as the second Eve. The first Eve took the forbidden fruit from the Tree of the Knowledge of Good and Evil, and gave it to the first Adam who ate and died. To effect restoration, God arranged for the second Eve to undo what the first Eve had done in taking the forbidden fruit, by granting to the second Eve the grace of being the source of the saving fruit. While the first Eve plucked the forbidden fruit with her hand, the second Eve did not pluck her fruit with her hand. Rather, by her obedient assent to God, it was given to her by God to bring forth her fruit from her own womb, and thus the second Adam (i.e. Christ) is the fruit of her womb [ὁ καρπὸς τῆς κοιλίας σου]. (Luke 1:42) The first Eve plucked from a tree the fruit which is death, and gave it to all mankind as sin. The second Eve bore from her womb the fruit that is Life, which at Calvary she offered on a tree to the Father on behalf of the sins of all mankind, and now extends to all mankind the grace that comes from the fruit of her womb. The first Eve was taken from the first Adam, as flesh of his flesh, and bone of his bones. The second Adam was taken from the second Eve, as flesh of her flesh, and bone of her bones. This second Adam said to us, “Unless you eat the flesh of the Son of man and drink His blood, you have no life in you; he who eats my flesh and drinks my blood has eternal life.” (John 6:53-54) Thus unless a man eats the fruit of Mary’s womb, he has no life in him, but if he eats the fruit of her womb, he has eternal life. To receive the Eucharist is to receive not only Christ’s self-offering, but is also to receive what the second Eve is giving to us, namely, the perfect fruit of her womb. This is one example, among others, in which Mary is an unmatched participant in Christ’s redemption of the world."
Bryan Cross has also written a helpful outline to a fantastic audio lecture on this topic by Dr. Lawrence Feingold (Ave Maria University) from the Association of Hebrew Catholics which he provides at the end of the article Here.