中文摘要：

目的研究母亲不同分娩年龄分组与剖宫产比率的关系,为降低剖宫产率提供参考数据。方法采用横断面时间段整群取样实况调查方法,本课题组于2005-2006年在深圳市宝安区妇幼保健院开展了8141例不同胎龄新生儿体格发育指标现场测量,并对产妇的相关影响因素进行现场调查。按母亲分娩年龄（19~38岁的每一岁）分组,研究分析各分娩年龄组剖宫产比率。结果剖宫产总平均比率为31.2%（2544/8141）;18岁剖宫产率最低,为18.2%,从19~38岁剖宫产率不断攀升,37岁组、39岁组剖宫产率为47.2%、44.9%,分别为剖宫产率的最高和次高。总平均母体因素、胎儿因素、社会因素占剖宫产的构成比依次为29.6%（754/2544）、19.5%（496/2544）和50.9%（1294/2544）。母体因素的构成比伴随分娩年龄增大而增大,而胎儿因素、社会因素的构成比却伴随分娩年龄增大而减少。结论母亲分娩年龄增大伴随着母体危险因素的增大,成为剖宫产率的重要影响因素之一。

英文摘要：

Objective To study the relationship between the cesarean section rate and mother childbearing age,and to provide reference data for the reducing of cesarean rate. Methods Cross-sectional time cluster sampling live investigation method,the research group carried out field measurement of different gestational age neonatal physical development indexes,in 8141 cases and the influencing factors related to maternal reproductive status were field investigated during the year of 2005- 2006 of our hospital in Shenzhen,and analyze cesarean section rate of each mother delivery age group（ 1 year-old interval for grouping for 19 to 38 year-old）.Results The total average cesarean section rate was 31. 2%（ 2544 /8141）,the cesarean section rate of 18 year-old group was 18. 2%which was the lowest. From 19 to 38 year-old,the cesarean section rate rised continuously. At the age of 37,39 year-old,cesarean section rate was 47. 2%,44. 9%,respectively which were the highest and second highest. The total average constituent ratios of maternal factors,fetal factors and social factors for cesarean section were 29. 6%（ 754 /2544）,19. 5%（ 496 /2544） and 50. 9%（ 1294 /2544） respectively. Constituent ratio of maternal factors associated with childbirth age positively. The fetal factors and ocial factors constitute ratios associated with childbirth age negtively. Conclusion Mother birth age increased with the increasing of maternal risk factors. which became one of the important influencing factors of cesarean section rate.