In Luke 1:18, Zechariah asks how he'll know, given his old age—the parallel annunciation question, though his doubt contrasts Mary's faith.

In Genesis 18:12, Sarah laughs at the promise of a son in her old age—a strong parallel to Mary's question about how she can conceive.

Jeremiah 31:22 prophesies a 'new thing'—a woman encircling a man—often tied to the virgin birth, providing OT background for Mary's conception.