Abstract: Objective：To explore the impact of the implementation of improved new labor to reduce the rate of cesarean section and the outcome of the mother and child. Methods：The information of pregnant women were analyzed from January to June in 2012 (group A) and from January to June in 2016 (group B) in Suzhou Hospital Affiliated to Nanjing Medical University. Compared the cesarean section rate and the outcome of the mother and child between the two groups. Results：The total labor time in group A was higher than that in group B, but the difference was not statistically significant [(501.70±210.39)min vs. (496.42±254.21)min, P=0.941]. The incidence of the second labor over 2 hours in group A was lower than that in group B, the difference was statistically significant (1.38% vs. 3.84%, P＜0.001). The utilization rate of oxytocin, the rate of amniotomy, the rate of episiotomy and the rate of forceps delivery in group A were significantly higher than that in group B, the difference was statistically significant (P＜0.001). The cesarean section rate in group A was higher than that in group B, and the difference was statistically significant (6.56% vs. 3.41%, P＜0.001). The cesarean section rate of fetal distress in group A (2.37%) was higher than that in group B (1.20%), and the difference was statistically significant (P＜0.001). The cesarean section rate of cephalopelvic disproportion in group A (4.05%) was higher than that in group B (1.98%) and the difference was statistically significant (P＜0.001). The rate of macrosomia in group A (8.14%) was higher than that in group B (6.76%), and the difference was statistically significant (P=0.04). The difference was not statistically significant between the two groups on the amount of postpartum hemorrhage and the rate of neonatal asphyxia (P＞0.05). The rate of being in NICU rate in group B was higher than that of group A, and the difference was statistically significant (9.13% vs. 2.65%, P＜0.001). Conclusions：The implementation of new labor can significantly reduce cesarean section rate in the vaginal delivery process, and the second stage of labor may be extended, which does not increase the adverse outcome of mother and child as long as to strengthen the monitoring of fetal heart.

Key words: Reference standards, Parturition, Labor, obstetric, Labor stage, second, Cesarean section, Pregnancy outcome