D. Schweitzer

Does epidural analgesia prolong labor and increase risk of cesarean delivery? A natural experiment.

M. Klebanoff, J. Zhang, Jun Zhang, 2001, American journal of obstetrics and gynecology.

Observations on labor epidural analgesia and operative delivery rates.

B. Pierce, M. Yancey, D. Daniels, 1999, American journal of obstetrics and gynecology.

Epidural Analgesia and Fetal Head Malposition at Vaginal Delivery

M. Klebanoff, Jun Zhang, M. Yancey, 2001, Obstetrics and gynecology.