Jerome

Let us read the Scriptures, and we will never find that holy women, except Rachel, gave birth with pain: because she was on the way and in the hippodrome, that is, in the race of horses, which are sold in Egypt, she gave birth to a son of pain, whom later the father called the son of his right hand. Eve, expelled from paradise and hearing: "In pain you will bring forth children," is said to have given birth in pain. …

Commentary On Micah 2.4 ↗

Gregory the Dialogist

26. But who was the daughter-in-law of Eli, if not the people of the Jews, subject to reprobate priests? Because she had received the seeds of unbelief in her mind through their preaching, she was pregnant. And because she was also thinking of pouring forth the malice she had conceived, she is said to have been not only pregnant but also near to giving birth. …

Commentary on 1 Kings, Book 3, Chapter 2 ↗

Bede

Now his daughter-in-law, the wife of Phinehas, was pregnant, etc. The Synagogue, entrusted with the children of the legal priesthood to govern, indeed received the seed of the word from the teachers and was near to producing the fruit of faith, which it had long sought, at the Lord's preaching. However, she too, after the fall of the teachers, turned away from the uprightness of living, and although she bore not a small crowd of people, she herself, because she killed the Author of life, gave birth to death.

Commentary on Samuel ↗