目的比较3 717例活产儿出生体重在性别、孕周、孕次、胎数及其父母年龄、职业、文化程度的差异,以及出生体重对分娩方式的影响,为采取围产保健工作干预措施提供科学依据。方法对1999年度出生的3 717名婴儿出生体重进行统计分析。结果平均出生体重高于WHO的国际参照值及1995年9市体格发育调查值。男性明显高于女性。35岁以上高龄孕妇巨大儿发生率显著高于20 ～34岁孕妇。经产妇巨大儿发生率也显著高于初产妇。双胎因早产发生率高,其平均出生体重明显低于单胎。结论本次调查显示,出生体重的增长趋势随胎龄的延长而增加,但第二次增重高峰延迟至38周。出生体重除与性别、孕产次、胎数有关外,还与父母年龄、文化、职业等社会经济状况密切相关。要加强孕妇营养、保健的正确指导,防止超重儿逐年上升,以降低成年期肥胖病、心血管疾病的发生率。 Objective To compare the differences in birth weight among 3 717 live births in terms of gender, gestational age, gestational age, number of births and their parents’ age, occupation and educational level, as well as the impact of birth weight on the mode of delivery. Scientific basis. Methods Statistical analysis was conducted on the 3,717 birth weight babies born in 1999. Results The average birth weight was higher than the WHO international reference value and the 1995 ninth city physical development survey value. Men were significantly higher than women. The incidence of giant males over the age of 35 was significantly higher than that of males aged 20 to 34 years. The incidence of maternal macrosomia was also significantly higher than that of primipara. Twins due to the high incidence of preterm birth, the average birth weight was significantly lower than singleton. Conclusion This survey shows that the growth trend of birth weight increases with gestational age, but the second weight gain peak is delayed to 38 weeks. In addition to birth weight and sex, motherhood, number of births, but also with the parents of age, culture, occupation and other socio-economic conditions are closely related. To strengthen the nutrition and health care of pregnant women, the correct guidance to prevent overweight children increased year by year, in order to reduce the incidence of adult obesity, cardiovascular disease.