Abstract: People worldwide have reach a common consensus about labor duration for six decades. The labor curve which raised by Friedman has become a golden standard for labor administration in their daily work. But as the characteristics of modern delivery population change, the past labor duration has been questioned by many researchers and become incommensurate with the modern population. This article would summarize the progression of labor duration and the time of some labor intervention like admission time of low risk nulliparous, when to start injection of oxytocin in the labor dystocia and when to stop it in labor induction amniotomy and labor analgesia in hope to have a new understanding of when and what to do during our daily work under the circumstance of new labor standard.

Key words: Admission time, Amniotomy, Oxytocin, Analgesia, obstetrical