少月经初潮的年龄少女出现第一次生理性子宫出血,即第一次来月经,叫初潮。它是少女进入青春期、性成熟过程中的一项重要标志。初潮一般在乳房发育开始后2年左右,身高激增峰后出现。据1978～1980年全国29个省、市、自治区13万妇女月经情况的调查,显示初潮年龄最小的9岁,最大的21 Older menarche age girls appear the first physiological uterine bleeding, that is the first time to menstruation, called the menarche. It is an important symbol of teenage girls entering adolescence and sexual maturity. Menarche usually occurs 2 years after the start of breast development, the height surge appears after the peak. According to a survey of 130,000 women in 29 provinces, municipalities and autonomous regions in China from 1978 to 1980, the smallest menarche at age 9 and the largest 21