That is a hard one, Carrie. My immediate thought was that I would go ahead and get pg. The fact is that we all take that risk to some extent when we decide to have babies. I understand that it's a bit different when you know there's a chance for a specific issue but then it isn't really all that different. Just a matter of degree. But then I think about how difficult it can be to take care of a baby/child with health/developmental issues and I don't know. I guess it would depend to some extent on the disorder and the chances of having a baby with it. If there was a very big chance of me having a baby with a disorder that would result in death very soon, I would not have babies. That would just be too painful for me. If the chance was low and the disorder not too difficult to deal with it, I'd probably go ahead and have a baby.
And for the second one, no, I would not have another baby if I knew it would break my marriage. THAT SAID... if having another baby was very deep down in my soul important to me, and my partner and I could not come to an agreement, then I would consider leaving my partner and getting pregnant on my own. I know that sounds backwards, but I would rather a child know that mommy wanted him/her very much, and decided to find a way to do that on her own, rather than mommy wanted a baby and daddy didn't, so daddy left (or over time realize that mommy and daddy hate each other). I don't ever want a child to have parents that are bitter about him/her. It's not fair.