本文随机抽取锦州中小、锦州四中、锦州市实验小学3所学校7～18岁的女生1980名为调查对象。采用现况调查法及概率单位回归法统计分析了月经初潮平均年龄。结果表明，月经来潮车于12岁和13岁达高峰，分别为55.78％和59.76％，初潮的最小年龄为10岁，最大年龄为16岁。依据上述大 This article randomly selected eight girls from 7 to 18 years old in Jinzhou Primary School, Jinzhou No. 4 Middle School and Jinzhou Experimental Primary School to be investigated. The average age of menarche was statistically analyzed using the current status survey method and probability unit regression method. The results showed that menstrual cramps peaked at 12 and 13 years old, with 55.78% and 59.76%, respectively. The minimum age of menarche was 10 years old, and the maximum age was 16 years old. According to the above