How Do I Get My Husband Excited About The Upcoming Birth Of Our First Child?

My husband Stephen and I are expecting our first child in November, I am thrilled about this. We've been married for 3 years and have spent the past year attempting to get pregnant. We are expecting a little girl we've decided to name Sadie. I know Stephen will love this baby unconditionally but, right now it appears as though he isn't very excited at all. He just keeps talking about how he knows nothing. I've tried telling him it will come naturally when Sadie gets here but I don't think he understands. Honestly, I think he is more worried about labor and delivery than I am . He keeps talking about how he doesn't know if he's going to be able to stand to see me in that much pain. What can I do to make him more comfortable with the prospect of being a father, he was fine and excited about this until the day we found out we were pregnant, I think it just hit him then that he REALLY was going to be a Daddy this time. I know he is going to be the best Daddy in the world, and that Sadie is going to love him more than anything, but how can I make him feel more comfortable and excited about being a Dad? What can I do to help him understand that he is just going to have to be able to support me through Labor and Delivery because as much as he doesn't want to see me in pain, he is going to have to be there for me. What can I do to resolve these issues? I love Stephen and I want him to share in my joy and excitement about OUR little girl.