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初中学生处于青春发育期,性器官与第二性征迅速发育。本文以初中男、女学生为对象,从初一追踪到初三,观察青春期性征形态发育的规律和进展,为建立我国青春期性征发育的形态指标提供数据,为青春期保健及教育提供理论依据。 对象和方法 一、观察对象 上海市区20所中学初中男学生1410名,女学生1320名,由于搬家、转学等因素造成部分学生失访,第二年男、女生各为1342名与1301名,第三年各为1296名与1225名。年龄组分布:初一:12～13岁,初二:13～14岁,初三14～15岁。
Junior high school students are in their puberty period, with rapid development of sexual organs and secondary sexual characteristics. In this paper, junior high school male and female students as the object, from the first track to the third day, observing the laws and progress of adolescent sexual characteristics morphological development, to provide data for the development of adolescent sexual characteristics of morphological indicators provide a theoretical basis for adolescent health and education . PARTICULARS AND METHODS 1.Objective The survey included 1410 male students and 1320 female students from 20 middle schools in Shanghai. As a result of the relocation of students and transfer of students, some students lost their lives. In the second year, 1342 and 1301 were girls and 12 girls respectively, The third year each is 1296 and 1225 respectively. Age distribution: Beginning: 12 to 13 years old, the first two: 13 to 14 years old, the third day 14 to 15 years old.