ACOG Committee Opinion number 269 February 2002. Analgesia and cesarean delivery rates. American College of Obstetricians and Gynecologists

Various studies report conflicting data with regard to the level of risk of cesarean delivery for nulliparous women who receive epidural analgesia before 5 cm of cervical dilatation. As a result, some institutions are requiring that laboring women reach 4-5 cm of dilatation before receiving epidural analgesia. The American College of Obstetricians and Gynecologists wishes to reaffirm the opinion published jointly with the American Society of Anesthesiologists that while under a physician's care, in the absence of a medical contraindication, maternal request is a sufficient medical indication for pain relief during labor. Decisions regarding analgesia should be coordinated among the obstetrician, the anesthesiologist, the patient, and support personnel.

Published by Obstetrics and gynecology, 2002. The guideline itself is at the source linked here.

doi.org/10.1016/s0029-7844(01)01770-7