What statistics does Hilary Erickson provide regarding epidural effectiveness?

Hilary Erickson shares that an epidural is designed to make you about 80% numb, which helps manage pain while still allowing some movement during labor. She also mentions that if you feel less than 80% pain relief, it's not very common and you should let your nurse know. In terms of how often an epidural might not work, she doesn't provide specific statistics but suggests it's not super frequent. However, as labor progresses, the dosage might need to be increased or the anesthesiologist might need to check on you. Remember, these are general observations and individual experiences can vary. Is there anything else you'd like to know about epidurals or childbirth?