The worse question is, is it more morally rightful for me to have children when I can afford the test that ensured he wasn't affected versus those who can't afford it? Does wealth and access make me rightful?
I don't think marriage bans are OK in general. Consenting adults can do whatever they want. Hell, let's bring polynomy forward too (but I'm not sure how consent would work there). As a matter of fact, I'm not even married so restriction or not didn't matter