What should a woman know before entering the delivery room?

Question by Lisa B: What should a woman know before entering the delivery room?
I am doing a project about Labor and Delivery Nurses and Birthing plans. I had a couple questions for some labor and delivery nurse or ob/gyns:
1. What are the responsibilities of a labor and delivery nurse?
2. What should a woman know/expect before entering the delivery room?
3. What are some common trends seen in the delivery room?
4. Do you recommend a birthing plan? If so, what should be included in it?
5.

Rice Cereal for Infants