Conclusions When the pelvis was normal, fetal macrosomia, abnormal fetal position and abnormal uterine were main causes leading to abnormal second stage of labor.
结论在骨盆正常情况下，新生儿过大、胎方位异常及产力异常是造成第二产程异常的主要原因。
Conclusion neonatal asphyxia, birth process and fetal position abnormal, with placenta functional defect together, are the factors mainly lead to neonatal asphyxia.
结论脐带因素、产程及胎位异常、胎盘功能不全是导致新生儿窒息的主要产科因素。
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