When S/D increased in ICP, it prompted fetal distress.Its sensitivity was 42.9%, specificity was 89.4%, negative predictive value (NPV) was 52.6% and positive predictive value (PPV) was 47.4%.

• ICP脐动脉多普勒检查阻力升高者出现胎儿窘迫的敏感性为42.；9%25，特异性为89