John Chrysostom

Truly He has loosed her barrenness, a supernatural gift He has bestowed upon her, and the unfruitful rock has produced the green blade. He has taken away her disgrace, in that He has made her to bring forth. Hence it follows: In the days wherein he looked on me, to take away my reproach among men. (Homil. de Anna.) Her joy therefore is twofold. The Lord has taken away from her the mark of barrenness, and also given her an illustrious offspring. …

Catena Aurea by Aquinas ↗

Ambrose of Milan

She who was hiding herself, because she had conceived a son, began to boast because she was giving birth to a prophet. And she who was ashamed before, now gives blessings; and she who was doubtful before, is strengthened. Behold, she says, how the voice of your greeting has become in my ears, the baby in my womb rejoiced with joy. Therefore, she cried out with a loud voice when she sensed the coming of the Lord; because she believed in the religious birth. …

Commentary on Luke ↗

Bede

After these days, Elizabeth, his wife, conceived. Specifically, after the days of Zacharias' duty were completed. John, the bishop of the city of Constantinople, mentioning this most holy conception, said: "These events occurred in the month of September, on the eighth day before the Kalends of October, when the moon was beginning its eleventh day, at the time when it was necessary for the Jews to celebrate the fast of Scenopegia. …

On the Gospel of Luke ↗

Bonaventure

Secondly, a fruitful conception is intimated, when he says: But after these days Elizabeth conceived: as is said in 1 Kings 1: "After the cycle of days Anna conceived." After the days of his office: in which it is shown that carnal things are to be set after spiritual things; and therefore below in chapter ten: "Mary has chosen the best part." Thirdly, a modest concealment is described, when it is said: And she hid herself for five months. …

Commentary on Luke, Chapter 1 ↗