It's not only the people who are directly affected who have to talk it through. I think we all need to talk about these things, to make it more normal. Talk about it before it happens. We all have a tendency to elevate any misfortune, small and large, to be the biggest thing ever, and how can you ever live through it.
(Edit: I'm not wanting to say that a miscarriage is a small misfortune. No, it's not. But there are many many worse things which can go wrong.)