Further reasons included…not having found the right partner.
I think this reason doesn’t get enough attention. I am childless, and there are a lot of complex reasons why that is, but I think I would have been much more likely to try to have kids if I had been able to find a woman I really wanted to have kids with. Of all the women I’ve been with, only one was someone I would want to have kids with, but she couldn’t have kids.