Jen, I have a post saved from MidwifeStephPDX with some evidence on this issue. There are a wide range of dates with the most current being 2007 - http://www.mothering.com/discussions...2&postcount=24
|Here is the list of resources supporting the position that women pushing with an uncontrollable urge do not have increased rates of cervical injury, slow descent, maternal exhaustion, or fetal distress:
McKay S, Roberts J. Second stage labor: what is normal? Journal of Obstetric Gynecologic and Neonatal Nursing. 1985;14(2):101-6.
Roberts JE, Goldstein SA, Gruener JS, Maggio M, Mendez-Bauer C. A descriptive analysis of involuntary bearing down efforts during the expulsive phase of labor. Journal of Obstetric Gynecologic and Neonatal Nursing. 1987; 16(1): 48-55.
Aderhold KJ, Roberts JE. Phases of second stage labor: Four descriptive case studies. Journal of Nurse-Midwifery. 1991; 36(5): 267-275.
Cosner KR, deJong E. Physiologic second stage labor. American Journal of Maternal and Child Nursing. 1993; 18: 38-43.
Thomson AM. Maternal behaviour during spontaneous and directed pushing in the second stage of labour. Journal of Advanced Nursing. 1995; 22(6):1027-34.
Roberts J, Woolley D. A second look at the second stage of labor. Journal of Obstetric Gynecologic and Neonatal Nursing. 1996; 25(5): 415-23.
Roberts J, Hanson L. Best practices in second stage labor care: maternal bearing down and positioning. Journal of Midwifery & Womens Health. 2007; 52(3):238-45.
Roberts, JE. The “push” for evidence: management of the second stage. Journal of Midwifery and Women’s Heath. 2002; 47(1): 2-15.
Petersen L, Besuner P. Pushing techniques during labor: Issues and controversies. Journal of Obstetric Gynecologic and Neonatal Nursing. 1997; 26(6): 719:726.