I’m asking because of curiosity - why don’t you want babies?
One friend was bipolar and felt she would be unable to be a good mother.
Others may have health issues, or their age may influence them. And some women (or men) simply do not have the desire. Financial concerns.
Some may feel a moral internal dispute about bringing children into the world in light of the way the world currently is and continues to head.
There are no doubt other reasons but that's a few that I've heard over the years.
By the way, the women I knew that regretted having children did still love their children, they simply felt they were not capable parents and/or felt it unfair the children were not in better home situations (divorce, abuse, etc).