i just thought of another good reference that might help your DH. There is a great book called "Men at Birth", a collection of stories from men about birth experiences from their perspective. David Vernon is the editor I think.

It is a while since I read it (3 years) but from memory it is an easy read with a good message for men. There are stories about hospital births and home births in there and I found that it quite gently led to a conclusion that women's bodies are amazing and quite well designed for birth, that birth in a hospital can be good but can also be taken over in by the medical profession (not in a good way) and that home birth can be a great way to birth. All of this from the mouths of men. It might be a good starting point for your DH to help him come to terms with other options.