D. the fetus should be evaluated with heart rate monitoring because PROM increases the risk of umbilical cord prolapse and fetal distress caused by oligohydramnios.
因为胎膜早破可致羊水过少从而增加脐带脱垂和胎儿窘迫的危险，故应做胎心监测观察胎儿情况。
2
Objective:To analyze the causes, clinical findings, labor management, way of delivery, and perinatal prognosis of revealed prolapse of umbilical cord.
目的：观察分析显性脐带脱垂的原因、临床表现、产程处理、分娩方式的选择及围产儿的预后。
3
Methods: Clinical management and perinatal prognosis of 12 cases of revealed prolapse of umbilical cord from 1998 to 2002 were retrospectively analyzed.