Objective To explore the endocrine mechanism of promoting labor through electroacupuncture at Hegu(LI4) and Sanyinjiao(SP6) points with different duration of needle retention in late pregnant rats.

• 目的通过动物实验探讨合谷、三阴交穴不同留针时间的电针刺激组合促分娩作用的内分泌机制。