umm, nope wrote:
Amelia Boone just wrote a column for Outside all about how she regrets not having kids, even though she doesn't actually regret it, and doesn't even know if he wants kids, and doesn't even think she likes kids, but she wishes it was up to her to decide, even though she's already decided by not having kids.
so yes, I think they all regret it, even if they didn't ever want them.
https://www.outsideonline.com/2423714/amelia-boone-motherhood-essay
"I think they all regret it." With no data. Sorry, that's just a dumb level of apparent confidence in your opinion.
As most know - and some have already said or alluded to - here's a 99.9% assurance answer to the OP's question: SOME DO, SOME DON'T.
I have no idea what the split is. 99.9% sure it's not 100/0 (or 0/100). Wouldn't surprise me if there is at least some research on the question.