I quoted a Church father, Saint Augustine, in the post just before yours!
How about Peter Chrysoslogus? "Where are they who think that the Virgin's conception and giving birth to her child are to be likened to those of other woman? For, this latter case is one of the earth, and the Virgin's is one from heaven. The one case is a case of divine power; the other of human weakness. The one case occurs in a body subject to passion; the other in the tranquility of the divine Spirit and peace of the human body. The blood was still, and the flesh astonished; her members were put at rest, and her entire womb was quiescent during the visit of the Holy One, until the Author of flesh could take on His garment of flesh, and until He, who was not merely to restore the earth to man but also to give him heaven, could become a heavenly Man. The virgin conceives, the Virgin brings forth her child, and she remains a virgin."
Sermon 117,(A.D. 432),in FC,XVII,200
Saint Ambrose said: " Imitate her, holy mothers, who in her only dearly beloved Son set forth so great an example of maternal virtue; for neither have you sweeter children, nor did the Virgin seek the consolation of being able to bear another son."
To the Christian at Vercellae, Letter 63:111(A.D. 396),in NPNF2,X:473
Saint John Chrysostom: "And when he had taken her, he knew her not, till she had brought forth her first-born Son.' He hath here used the word till,' not that thou shouldest suspect that afterwards he did know her, but to inform thee that before the birth the Virgin was wholly untouched by man. But why then, it may be said, hath he used the word, till'? Because it is usual in Scripture often to do this, and to use this expression without reference to limited times. For so with respect to the ark likewise, it is said, The raven returned not till the earth was dried up.' And yet it did not return even after that time. And when discoursing also of God, the Scripture saith, From age until age Thou art,' not as fixing limits in this case. And again when it is preaching the Gospel beforehand, and saying, In his days shall righteousness flourish, and abundance of peace, till the moon be taken away,' it doth not set a limit to this fair part of creation. So then here likewise, it uses the word "till," to make certain what was before the birth, but as to what follows, it leaves thee to make the inference. Thus, what it was necessary for thee to learn of Him, this He Himself hath said; that the Virgin was untouched by man until the birth; but that which both was seen to be a consequence of the former statement, and was acknowledged, this in its turn he leaves for thee to perceive; namely, that not even after this, she having so become a mother, and having been counted worthy of a new sort of travail, and a child-bearing so strange, could that righteous man ever have endured to know her. For if he had known her, and had kept her in the place of a wife, how is it that our Lord commits her, as unprotected, and having no one, to His disciple, and commands him to take her to his own home? How then, one may say, are James and the others called His brethren? In the same kind of way as Joseph himself was supposed to be husband of Mary. For many were the veils provided, that the birth, being such as it was, might be for a time screened. Wherefore even John so called them, saying, For neither did His brethren believe in Him.' "
Gospel of Matthew,V:5(A.D. 370),in NPNF1,X:33