Michelle,
First of all congrats!
My stepdaughter (who does NOT have CF) has been induced with both of her kids. I know that it makes your labor come on harder and faster. She had an epidural so I don't think it mattered much. But she delivered both kids vaginally.
BE careful though, her dr. estimated the last baby to be 8 pounds and he was 9lbs, 9 oz. when he was born.
I know this wasn't much help with your CF stuff but I thought I'd just add her situation.
Good luck with everything,
Kelli
29 f CF