Amazing. One if the most interesting parts of the article though is that this is such a known phenomenon in practice, not only in theory. Just goes to show what 0.3% works out to when you're on the scale of modern populations.
Personally I also find it admiral how positive people can be in such circumstances. I would be wracked with anxiety in this situation, as the husband at least. But thankfully it seems like our drive to have children overrides many things that would otherwise terrify us.