Practical considerations for the routine application of left lateral Sims' position for vaginal delivery.

The lateral Sims' position was evaluated for routine use in vaginal deliveries. The study demonstrates that delivery in the lateral Sims' position is practical and easily mastered; most easily applied for spontaneous or uncomplicated outlet forceps delivery; of special advantage in breech deliveries, congestive heart failure, hip joint restriction, and leg varicosities; and well accepted by women looking for a less restricted and more natural delivery experience.