I was strongly childfree age 11-27 and things changed since after being with my partner (although he was happy to be childfree too, he's just flexible). We're still adjusting to the change I'm experiencing, but anyway...

I went to the doctor because I was really unwell with a bug and she wanted to know if I was planning to have a baby because I should change my daily meds to something else. I said no (I wasn't then) and after a bit of a tangle I left. When I later changed my mind I thought I should go back to her since she was so into asking and planning when I was half dead. I returned and explained why I was now seeking her advice on the medication but she suddenly had no interest in helping me and told me I'd need to see someone else. That experience has made me think it really is more of a control thing than anything else...