There is alot of changing data out there, regarding pain. Women in particular will have strong opinions about this. Some women feel like failures if they ask for pain meds and (expose their babies to drugs.) Some women are already so frightened from horror stories from the pain, that they say; "Prep the epidural while we pull into the parking lot." Healthy babies are born either way all the time.
Your job is to help the mother of your child wade through the various theories and options, meet the doctors, trust your instincts and when the time comes- tell her she's going to be a great mom, she's a trooper, she's wonderful, etc. Take the abuse that you WILL receive during transition, and then never have a good night's sleep for the rest of your life.
By the way, Congratulations! and You're doing a great job!
Wisdom and well said.