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在内分泌系统的调节下,女性子宫内膜发生有规律的周期性脱落并伴有出血的现象称为月经。月经的出现标志着女性性功能趋于成熟,女性第一次月经来临被称为初潮~([1])。月经初潮被称为女性发育过程中的“里程碑”~([2])。月经初潮多数发生在夏天,初潮的年龄大约在11~18岁,多数在12~14岁间来潮,各地报道城市和农村女生平均初潮年龄略有不同~([1])。欧美发达国家的女生平均初潮年龄较早,发展中国家和
In the regulation of the endocrine system, the occurrence of regular menstrual endometrial shedding and accompanied by bleeding is called menstruation. The appearance of menstruation marks the sexual function of women tends to mature, the first menstruation of women is called menarche ~ ([1]). Menarche is called “Milestone” ~ ([2]) in the process of female development. The majority of menarche occur in the summer, and the age of menarche is about 11-18 years old, with the majority reaching the age of 12-14 years old. The average age of menarche in urban and rural areas is reported to be slightly different in different places ([1]). The average menarche of girls in the developed countries of Europe and the United States is earlier than that of the developing countries