Abstract:Objective To investigate the correlation between CategoryⅡ electronic fetal monitoring (EFM) tracing happened in the second stage of labor and the incidence of adverse short-term pregnancy outcomes. Methods A total of 527 subjects who had prenatal examination in Guangzhou Women and Children’s Medical Centre from 1st January 2017 to 30th June 2017 were included. The subjects were singleton term deliveries with cephalic presentation. Intrapartum EFM were conducted continuously for the subjects. Totally 225 women with Category Ⅱ EFM tracing in the second stage of labor were classified as case group and the rest with normal EFM tracing in the second stage of labor were classified as control group. Incidence rate of short-term pregnancy outcomes was compared between the two groups. Results Pregnant women in the case group had higher rate of episiotomy (71.1%, P = 0.000), forceps delivery (29.3%, P = 0.000), amniotic fluid contamination (38.2%, P = 0.000), asphyxia of neonates (2.2%, P = 0.023) and admission of neonates (10.2%, P = 0.000) comparing with those in the control group. No statistically significant differences of postpartum hemorrhage and arterial cord (pH < 7.20) were found between the two groups. Conclusion Adverse pregnancy outcomes are more likely to happen in the women with category Ⅱ EFM tracing in the second stage of labor.