一般认为,第二产程(简称二程)时限太长,可能造成新生儿窒息,但如通过阴道手术助产缩短二程,又可能造成新生儿损伤。为了解随二程的延长,新生儿病率与死亡率是否增加,对Manitoba大学附属妇产科医院5年间分娩的6041例孕妇行回顾性分析。本组均为初产妇,单胎,进入二程时均为活胎,头位。胎儿体重≥2500g,阴道检查宫口开全确定为二程开始时间。围产结局的监测包括:①二程死产或 Generally believed that the second stage of labor (referred to as two-way) is too long, may cause neonatal asphyxia, but if vaginal surgery to shorten the two-way midwifery, but also may result in neonatal injury. To understand whether the newborns’ morbidity and mortality increased with the extension of the two courses, a retrospective analysis of 6,041 pregnant women who gave birth within 5 years at Manitoba University Obstetrics and Gynecology Hospital was conducted. This group are primiparous, single-child, entering the second round when both live births, head position. Fetal weight ≥ 2500g, vaginal examination cervix opened all the way to determine the beginning of the two way. Perinatal outcomes of the monitoring include: ① two stillbirth or