The vital signs, fetal heart rate (FHR), labor process, mode of delivery, amount of oxytocin required, Apgar score of neonates and umbilical venous blood gas analysis were recorded.

• 记录各组产妇的血压、脉搏、心电、血氧饱和度、胎心率 (FHR)、产程长短、分娩方式、催产素用量以及新生儿Apgar评分和脐静脉血气分析。