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。
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。
The rates of umbilical cord prolapse and neonatal asphyxia have no obvious difference and statistically significant.
脐带脱垂率与新生儿窒息率差异不明显无统计学意义。
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