This seems like the most inhumane way to make the decision discussed, even if you're not necessarily wrong for taking this approach. I can't imagine what it'd be like being a small child in a household where your parents "had doubt" and turns out they didn't really want you after all. You can't fake it well enough for 18 years where they wouldn't notice. Just sad imho
1. You’re 100% sure you don’t want kids? Then don’t.
2. In all other cases, have a child. Even when in doubt.
Years will pass and doubt may perish, but with it also the ability to have children.