青春发育期是人类生长发育过程的重要阶段、其特征表现为一系列的形态、生理、生化、内分泌以及心理、智力、行为的突变。为了掌握广州市区男女学生青春期开始的年龄、男性生殖器、男女第二性征发育的规律、特点。我们于1981年5月7日～6月10日对市区3889名8～18岁学生进行了调查,为今后指导学生青春期体育卫生工作提供科学的依据。调查对象与方法 (一)调查对象: The puberty is an important stage of human growth and development, which is characterized by a series of morphological, physiological, biochemical, endocrine and psychological, intellectual and behavioral changes. In order to grasp the male and female students in Guangzhou city began adolescent age, male genitalia, male and female secondary sexual characteristics of the law of development. From May 7 to June 10, 1981, we conducted a survey of 3,889 students aged 8 to 18 in the urban area to provide a scientific basis for guiding students in adolescent sports and health work in the future. Survey objects and methods (A) the survey: