You should choose a birth ball according to your height. The most common size is the 65-centimeter ball. Using movement with the birth ball can increase the benefits. You can sway side to side or in a circle. This movement is easy to do in labor. It also helps stretch your body and move the baby into a good position for birth by using movement, gravity, and upright positioning. You can do this position either on the bed or on the floor. Just be sure that the ball is stable if you use a taller surface. When using this position, you need to make sure you are leaning into the ball enough to help it stay secure on the bed. A roll of towels or having someone sit on the opposite side of the ball can also work well. Some studies have shown the use of a peanut ball reduces the cesarean rate in mothers who have an epidural. This can be a great way to help keep moving in bed while still resting. However, many hospitals do not have a peanut ball and you may have to bring your own with you. This is something that you would need to ask about in your ​hospital tour. You may need help from your doula or a nurse to get positioned with the ball. This helps your pelvis stay open while you are resting.