为了解我县女学生月经初潮年龄变化情况．我们于1995年5月对县内城乡女学生月经初潮年龄进行了调查，以此与1981年我县调查资料进行对比，观察14年间女生月经初潮年龄变化情况．以便为开展青春期卫生知识教育提供科学依据。1对象与方法1．1对象：本次仍以1981年选择的县城第一 To understand the changing age of menarche in female students in my county. In May 1995, we conducted a survey of the menarche age of female students in urban and rural counties in the county. This compares with the survey data of our county in 1981 and observes the age change of menarche among girls during 14 years. In order to provide a scientific basis for the education of adolescent health education. 1 objects and methods 1.1 objects: this is still the first county in 1981 to choose