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对４７８名小学生的月经初潮（首次遗精）出现率、乳房、阴毛、腋毛和睾丸体积等性发育指标进行连续３年的追踪观察。结果指出：女生各年龄组肥胖儿童月经初潮出现率高于正常组，而男生各年龄组肥胖儿童首次遗精出现率低于正常组；男生组肥胖儿童睾丸体积较正常组小，并且在１２～１３岁组与肥胖程度呈负相关；男生体征指数在１１～１４岁组与肥胖程度相关，而女生仅在１３岁组与肥胖程度相关。提示肥胖儿童青春初期性发育在女孩有提早而在男孩有落后的趋势。
The incidence of menarche (first spermatorrhea), sex development indexes of breast, pubic hair, armpit hair and testis of 478 primary school students were observed for 3 consecutive years. The results showed that the prevalence of menarche in obese children of all age groups was higher than that of normal group, while the incidence of first-time spermatogenesis in obese children of all age groups was lower than that of normal group. The testicular volume of obese children in boys group was smaller than that of normal group, The age group was negatively correlated with the degree of obesity. The boys’ body mass index was associated with the degree of obesity in the age group of 11-14 years, while the female group was associated with the degree of obesity only in the 13-year-old group. Prompted early sexual development of obese children in girls early and backward trend in boys.