Epidural anesthesia has changed dramatically since its introduction to the obstetric arena in the early 1970s. Now we have various types of epidurals we can administer during labor. One of the major obstacles for anesthesiologists is determining how women perceive pain during labor and how to administer the proper dosage of pain medication. Dr. Cynthia Wong, associate professor of anesthesiology at Northwestern University's Feinberg School of Medicine, joins host Dr. Lisa Mazzullo to discuss these issues, and her recent study that looks at the rate of Cesarean deliveries when epidural anesthesia is administered at different times during labor.