The analgesia efficacy of the inhaling laughing gas group was not as good as that of epidural block, but method of former was simple.
笑气吸入麻醉分娩镇痛效果不及硬膜外麻醉，但方法简单。
Conclusion: Analgesic labor with inhaling laughing gas is safe, effective and simple and is worthy of popularizing in obstetrics, which shows on side effects on both mother and fetus.
结论：氧化亚氮吸入用于分娩镇痛效果肯定，对母儿无不良影响，是一种安全、有效、简便的无痛分娩方法，值得产科临床推广应用。
Conclusion: Analgesic labor with inhaling laughing gas is safe, effective and simple and is worthy of popularizing in obstetrics, which shows on side effects on both mother and fetus.
结论：氧化亚氮吸入用于分娩镇痛效果肯定，对母儿无不良影响，是一种安全、有效、简便的无痛分娩方法，值得产科临床推广应用。
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