分娩期疼痛是客观存在的生理现象，可因个体差异、产程的不同阶段及医务人员宣教程度而异。并不是每位产妇或全产程均必须要用镇痛药物或麻醉。多数产妇是在产程进入活跃期后宫颈扩张，宫缩加强，胎儿先露下降时疼痛加剧，至宫口扩张７～８ｃｍ时，疼痛最为难忍，需要用药... Pain during childbirth is an objective physical phenomenon that can vary according to individual differences, different stages of labor, and the degree to which medical personnel are educated. Not every maternal or full-time job must use analgesics or anesthesia. The majority of maternal labor is in the active phase of labor after cervical dilatation, contractions strengthened, the fetus was exposed when the decline in pain increased to the cervix when the expansion of 7 ~ 8cm, the pain is most unbearable, the need medication ...