目的:探讨潜伏期胎儿脐血流分析对预测胎儿宫内窘迫的价值。方法:选择产程尚处于潜伏期的300例孕妇为研究组,分别进行收缩期和间歇期脐血流分析(其中S/D≥3.0为A组;S/D<3.0为B组)。随机抽取潜伏期未行脐血流检查孕妇300例为对照组(C组),观察各组间在产程中胎儿宫内窘迫的发生率、新生儿窒息的发生率及剖宫产率。结果:S/D比值对胎儿预后的阳性预测值、特异度均明显高于缩宫素激惹试验(OCT)。结论:潜伏期脐血流检查能有效筛查胎儿宫内窘迫,指导临床治疗,减少新生儿窒息率。 Objective: To investigate the value of fetal cord blood flow analysis in predicting fetal distress. Methods: The 300 pregnant women who were still in the incubation period were selected as study group, and their umbilical blood flow was analyzed respectively in systole and intermittence (S / D≥3.0 for group A; S / D <3.0 for group B). A total of 300 pregnant women without latent cord blood flow were randomly selected as the control group (C group). The incidence of fetal distress, the incidence of neonatal asphyxia and the rate of cesarean section in labor were observed. Results: The positive predictive value and specificity of S / D ratio in fetal prognosis were significantly higher than those in oxytocin challenge test (OCT). Conclusion: The screening of umbilical cord blood can effectively screen fetal distress, guide the clinical treatment and reduce neonatal asphyxia.