I can barely bring myself to read stories like this now. I never really thought about it before my son was born, but there's always this dread you live with in the back of your mind. This little helpless person has your life in it's hands. The world and fate is trying to take them out, and if they succeed you'd never recover. You can learn to live with pain, but I don't believe you ever get over something like that.
It is really scary to think about it. But don't focus on what you might loose. Just be grateful for what you have. Try to enjoy every moment you have with them.
But then maybe it's good to have a dose of it once in awhile, to keep me from getting to comfortable with his safety.