In “Mystical City of God” by Ven. Mary of Agreda, it splits that particular chapter up into multiple fragments and addresses each one.
And being with child
-The cool insight here goes along the lines of:
“…She was shown to the angels as being the resting place of the holy Trinity, represented in the divine personality of the Word incarnate. For on account of their inseparable union and co-existence, all the three Persons could not fail to be there, wherever any one of Them was present; although only the Person of the Word assumed human flesh and with Him alone was She pregnant.”
She cried travailing in birth
“…God [was] born humble, poor, and unknown: yet afterwards the news of that Birth was proclaimed so loudly, that its first echo excited King Herod and filled him with uneasiness. It drew the Magi from their palaces and kingdoms in order to find him. Some hearts were touched with fear, others moved to interior affection. The Fruit of this birth, growing until it was raised on the Cross, gave such loud voices that It was heard from the rising to the setting sun and from farthest north of farthest south. So far then was heard the voice of that Woman who gave birth to the Word of the eternal Father.”
And was in pain to be delivered."
“He does not say this because She was to give birth in bodily pain, for that is not possible in this divine Parturition. But because it was to be a great sorrow for that Mother to see that divine Infant come forth from the secrecy of her virginal womb in order to suffer and die as a victim for the satisfaction of the sins of the world. For this Queen could know and did know all this beforehand by her knowledge of the holy Scriptures… Thus the sorrows of this birth were not the effect of sin, as they are in the descendants of Eve, but they were the effect of the intense and perfect love of the most holy Mother for her divine Son.”
Hope that helps give some food for thought.