因为剖宫产儿更易患免疫系统方面的疾病，我们决定我们的研究要重点关注白细胞的DNA变异。

As the diseases that tend to be more common in people delivered by C-section are connected with the immune system, we decided to focus our research on early DNA changes to the white blood cells.

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结论胎儿窘迫的过度诊断和社会因素在一定程度上增加了剖宫产率，但围产儿死亡率并未下降。

Conclusions: The overall rate of caesarean section has risen because of Excessive diagnosis of fetal distress and social factors, but perinatal mortality has not decreased.

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目的探索脐带缠绕对围产儿的影响，以期确定脐带缠绕的合适处理方法及恰当的剖宫产指征。

Objective: To investigate the prenatal diagnosis, relative management, and the relationship between the method of delivery, the fetus status and umbilical cord entanglement.

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