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随着生活水平的改善，女学生月经初潮年龄也在逐渐提前，且呈生长期加速趋势。为了解城市女学生青春期的发育状况，给指导和开展女学生青春期卫生保健工作提供依据，我们于1997年对在校汉族女学生进行了月经状况的调查。1对象与方法1．l对象本文选择济南市区有代表性的初中2所
With the improvement of the standard of living, the age of menarche for female students is also gradually advanced, and it is showing an accelerating trend in the growth period. To understand the adolescent development of urban female students and provide guidance for the development and implementation of adolescent health care for female students, we conducted a survey on the status of menstruation among female Han students in school in 1997. 1 objects and methods l Subjects This article selects the representative secondary schools in Jinan City