目的:探讨控制孕期饮食与体重对预防巨大儿的临床意义。方法:选取2010年1月~2012年8月于我院体检正常单胎妊娠孕妇260例,随机分为对照组与观察组各130例,观察组在孕期进行合理饮食指导,促使孕妇孕期体重合理增加,对照组不进行饮食与体重控制,对比2组孕妇分娩时巨大儿发生情况及相关指标。结果:2组孕妇孕前体重、分娩周数、新生儿体重无显著差异(P>0.05),观察组孕妇产前体重增加与产前BMI增加值均明显低于对照组(P<0.05),剖宫产率与巨大儿发生率均显著低于对照组(P<0.05)。结论:孕期进行饮食及体重控制可降低剖宫产率,有效预防巨大儿发生,值得在临床中推广。 Objective: To explore the clinical significance of controlling diet and body weight during pregnancy to prevent macrosomia. Methods: From January 2010 to August 2012, 260 pregnant women with normal singleton pregnancy in our hospital were randomly divided into control group and observation group with 130 cases each. The observation group received reasonable dietary guidance during pregnancy to promote pregnant women ’s weight during pregnancy Increase, the control group without diet and weight control, compared with two groups of pregnant women, childbirth macrosomia occurred and related indicators. Results: There was no significant difference in pre-pregnancy weight, number of weeks of delivery and newborn weight between the two groups (P> 0.05). Prenatal weight gain and prenatal BMI increase in observation group were significantly lower than those in control group (P <0.05) The incidence of uterine and macrosomia were significantly lower than the control group (P <0.05). Conclusion: Pregnancy diet and weight control can reduce the rate of cesarean section, effectively prevent the occurrence of macrosomia, it is worth in the clinical promotion.