John Gill Commentary Genesis 30:22

"And God remembered Rachel, and God hearkened to her, and opened her womb." — Genesis 30:22 (ASV)

And God remembered Rachel In a way of mercy and kindness, whom he seemed to have forgotten, by not giving her children.

and God hearkened to her To her prayer, which had been made time after time, that she might have children; but hitherto God had delayed to answer, but now gives one.

and opened her womb Gave her conception, and made her fruitful, and she became the mother of a child she so much desired.