Objective:To explore the significance of active A level prognosis for fetal distress.Methods:The active A levels in umbilical artery blood were detected from 92 pregnant women,their relationship was analyzed according to active A levels of cases with different degrees of asphyxia.Results:The active A level in umbilical artery blood of fetal distress group was significantly higher than that of control group (P0.05); the active A level in umbilical artery blood of severe fetal distress group was significantly higher than that of mild fetal distress group (P0.05); there was no significant difference in active A level in umbilical artery blood between spontaneous labor group and cesarean section group (P0.05).Conclusion:The active A level in umbilical artery blood has a predictive value for fetal distress,which can be used as a new index of predicting fetal distress.