I had it while in labor. I will now go natural because I know the pain I'll feel I can do it. The femoral made me sleep for 2 hrs which was nice but I woke up every few minutes with awful contractions and I felt everything when I woke up but I was drugged up so bad that I was panicking and couldn't breath and didn't understand what was going on anymore. Thank goodness as soon as my son came out the rush I got blocked out how drugged up I was until I got to the post pardum room then I couldn't even speak to nurses because I kept passing out from the drugs.
I had it while I was in labor before I was able to get the epidural and it took a little of the edge off but I was in a lot of pain so it still hurt pretty bad.