Whether Christ's Mother was a virgin in His birth?

Objections

Objection 1 : It would seem that Christ's Mother was not a virgin in His Birth. For Ambrose says on Lk. 2:23: "He who sanctified a strange womb, for the birth of a prophet, He it is who opened His Mother's womb, that He might go forth unspotted." But opening of the womb excludes virginity. Therefore Christ's Mother was not a virgin in His Birth.
Objection 2 : Further, nothing should have taken place in the mystery of Christ, which would make His body to seem unreal. Now it seems to pertain not to a true but to an unreal body, to be able to go through a closed passage; since two bodies cannot be in one place at the same time. It was therefore unfitting that Christ's body should come forth from His Mother's closed womb: and consequently that she should remain a virgin in giving birth to Him.
Objection 3 : Further, as Gregory says in the Homily for the octave of Easter [*xxvi in Evang.], that by entering after His Resurrection where the disciples were gathered, the doors being shut, our Lord "showed that His body was the same in nature but differed in glory": so that it seems that to go through a closed passage pertains to a glorified body. But Christ's body was not glorified in its conception, but was passible, having "the likeness of sinful flesh," as the Apostle says (Rm. 8:3). Therefore He did not come forth through the closed womb of the Virgin.