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为了进一步了解我市男女学生月经初潮和首次遗精的发生现状及其变化规律。于1995年4～6月份在沈阳市作了此项调查结合前几次的调查结果，进行综合分析。1对象及方法1．1随机抽取沈阳市城乡9～18岁的男女学生进行首次退精、月经初潮调查。以和平区代表城市组、新民代表乡村组，
In order to further understand the city men and women students menarche and the first occurrence of spermatorrhea and changes in the law. In April and June 1995 in Shenyang City, made the survey combined with previous findings, a comprehensive analysis. 1 Subjects and Methods 1.1 randomly selected male and female students from 9 to 18 years old in urban and rural areas of Shenyang City for the first time, the investigation of menarche. Heping District representative city group, Xinmin representative country group,