Abstract: Labor analgesia has become one of the major public health undertakings in most developed countries. Intrathecal analgesia is a mature and effective technique. Our country in recent years, with the scope of labor analgesia, the related problems of intraspinal labor analgesia have also been widely debated, such as fever,  the influence of epidural analgesia on the second labor duration, the influence of the cesarean section rate and instruments midwifery, and potential adverse effect on the mother and baby. Until now, most studies suggest effective labor analgesia is associated with the pro-longation of second stage of labor, thereby increasing the relative risk of neonatal complications and equipment rate of midwifery. A number of studies support the epidural labor analgesia associated with maternal clinical fever. But labor analgesia can reduce the incidence of maternal postpartum depression. Therefore, the future development of this field will continue to have a significant impact on women and children health.

Key words: Anesthesia；, Anesthesia, obstetrical；, Anesthesia and analgesia；, Anesthesia, spinal；, Labor stage, second