In my family of my parents age level, 5/8 have children Of those children, 3/8 have children but 3 of those without are what I'd consider "open to have children", as in no clue if they want/will or not.

In total, 8 couples (16 people) produced 8 people in my parents generation in the family. The followup 3/8 produced 4 so far.

I don't think your point has no value, but I think it doesn't target the right thing to look at, especially since you'd kinda have to consider adoption alongside with it.