I read the Motherlode blog on NYTimes.com every now and again and they had a recent post about life after infertility treatments fail.
It sort of put into words some of the thoughts I've had about what happens if this next thing doesn't work. In theory I KNOW we would be fine, but still, it's hard to see that life as the one that I'm vested in involves us loving and raising our child.
But that said, you can go crazy (and broke) running after that carrot called "just one more cycle."
Anyway, the post is a good read. If you have a few minutes check it out.