目的：探讨孕前身体质量指数（ BMI）和孕期体重增长对分娩方式的影响。方法采用回顾性方法分析2012年1至12月在六安市妇幼保健院住院分娩的300例阴道分娩和300例剖宫产足月单胎产妇的临床资料。结果剖宫产组孕前身体质量指数高于阴道分娩组（t＝3．37，P＜0．01），孕前身体质量指数＜18．5kg/m2的剖宫产率明显低于孕前身体质量指数＞18．5kg/m2者，χ2＝11．04，P＜0．01；剖宫产组孕期体重增幅高于阴道分娩组（t＝13．98，P＜0．01），孕期身体质量指数增幅＜4kg/m2的剖宫产率明显低于孕期身体质量指数增幅在4～6kg/m2之间和孕期身体质量指数增幅＞6kg/m2者（χ2值分别为91．32和110．43，均P＜0．01）。结论控制孕前体重和孕期体重增长可有效降低剖宫产率。%Objective To explore the impact of pre-pregnancy BMI and weight gain during pregnancy on the mode of delivery .Methods A retrospective analysis was conducted on the clinical data of 300 cases of vaginal delivery and 300 cases of cesarean section at term singleton pregnancy from January to December in 2012 in Lu’ an Maternal and Child Health Hospital .Results Pre-pregnancy BMI of the cesarean section group was higher than that of the vaginal delivery group (t=3.37, P<0.01).The cesarean section rate of patients with pre-pregnancy BMI<18.5kg/m2 was significantly lower than those with pre-pregnancy BMI>18.5kg/m2 (χ2 =11.04,P<0.01).The weight gain of cesarean section group was higher than vaginal delivery group (t=13.98,P<0.01).The cesarean section rate of the patients with increase of BMI<4kg/m2 was significantly lower than that of those with increase of BMI ranging 4-6kg/m2 and those with increase of BMI>6kg/m2(t value was 91.32 and 110.43, respectively, both P<0.01).Conclusion Control of pre-pregnancy weight and weight gain during pregnancy can reduce the rate of cesarean section .
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