A new type of "ball" that is used in labor is the peanut ball. It is great for using in the bed to open the pelvis and make labor more comfortable. Since it is used in the bed, this ball is great for moms who choose an epidural, but still want to take advantage of effective position changes.
Ask your care provider if they have the peanut ball the birthing environment where they practice. For more information about the peanut ball, check out this video: