This is Orthodox Apostolic Christian belief.
In accordance with this design, Mary the Virgin is found obedient, saying, 'Behold the handmaid of the Lord; be it unto me according to thy word.' But Eve was disobedient; for she did not obey when as yet she was a virgin. And even as she, having indeed a husband, Adam, but being nevertheless as yet a virgin (for in Paradise 'they were both naked, and were not ashamed,' inasmuch as they, having been created a short time previously, had no understanding of the procreation of children: for it was necessary that they should first come to adult age, and then multiply from that time onward), having become disobedient, was made the cause of death, both to herself and to the entire human race; so also did Mary, having a man betrothed [to her], and being nevertheless a virgin, by yielding obedience, become the cause of salvation, both to herself and the whole human race. And on this account does the law term a woman betrothed to a man, the wife of him who had betrothed her, although she was as yet a virgin; thus indicating the back-reference from Mary to Eve, because what is joined together could not otherwise be put asunder than by inversion of the process by which these bonds of union had arisen; s so that the former ties be cancelled by the latter, that the latter may set the former again at liberty. And it has, in fact, happened that the first compact looses from the second tie, but that the second tie takes the position of the first which has been cancelled. For this reason did the Lord declare that the first should in truth be last, and the last first. And the prophet, too, indicates the same, saying, "instead of fathers, children have been born unto thee.' For the Lord, having been born "the First-begotten of the dead,' and receiving into His bosom the ancient fathers, has regenerated them into the life of God, He having been made Himself the beginning of those that live, as Adam became the beginning of those who die. Wherefore also Luke, commencing the genealogy with the Lord, carried it back to Adam, indicating that it was He who regenerated them into the Gospel of life, and not they Him. And thus also it was that the knot of Eve's disobedience was loosed by the obedience of Mary. For what the virgin Eve had bound fast through unbelief, this did the virgin Mary set free through faith."
Irenaeus,Against Heresies,3:22(A.D. 180),in ANF,I:455
There is one Physician who is possessed both of flesh and spirit; both made and not made; God existing in flesh; true life in death; both of Mary and of God; first possible and then impossible, even Jesus Christ our Lord."
Ignatius,To the Ephesians,7(A.D.110),in ANF,I:52
Accordingly, a virgin did conceive and bear 'Emmanuel, God with us.' This is the new nativity; a man is born in God. And in this man God was born, taking the flesh of an ancient race, without the help, however, of the ancient seed, in order that He might reform it with a new seed, that is, in a spiritual manner, and cleanse it by the re-moral of all its ancient stains. But the whole of this new birth was prefigured, as was the case in all other instances, in ancient type, the Lord being born as man by a dispensation in which a virgin was the medium. The earth was still in a virgin state, reduced as yet by no human labour, with no seed as yet cast into its furrows, when, as we are told, God made man out of it into a living soul. As, then, the first Adam is thus introduced to us, it is a just inference that the second Adam likewise, as the apostle has told us, was formed by God into a quickening spirit out of the ground,--in other words, out of a flesh which was unstained as yet by any human generation. But that I may lose no opportunity of supporting my argument from the name of Adam, why is Christ called Adam by the apostle, unless it be that, as man, He was of that earthly origin? And even reason here maintains the same conclusion, because it was by just the contrary operation that God recovered His own image and likeness, of which He had been robbed by the devil. For it was while Eve was yet a virgin, that the ensnaring word had crept into her ear which was to build the edifice of death. Into a virgin's soul, in like manner, must be introduced that Word of God which was to raise the fabric of life; so that what had been reduced to ruin by this sex, might by the selfsame sex be recovered to salvation. As Eve had believed the serpent, so Mary believed the angel. The delinquency which the one occasioned by believing, the other by believing effaced. But (it will be said) Eve did not at the devil's word conceive in her womb. Well, she at all events conceived; for the devil's word afterwards became as seed to her that she should conceive as an outcast, and bring forth in sorrow. Indeed she gave birth to a fratricidal devil; whilst Mary, on the contrary, bare one who was one day to secure salvation to Israel, His own brother after the flesh, and the murderer of Himself. God therefore sent down into the virgin's womb His Word, as the good Brother, who should blot out the memory of the evil brother. Hence it was necessary that Christ should come forth for the salvation of man, in that condition of flesh into which man had entered ever since his condemnation."
Tertullian,Flesh of Christ,17(A.D. 212),in ANF,III:536
