引用
最初由 thusand 发布
15岁早该来了。不来的话要去医院让怪蜀黍检查身体...
还有这帖子的走向很微妙...[/han]
声明:我不是专业的,只是引一下wiki而已。
“東方女性初經的平均年齡在
12至16歲,不同國家的統計略有些微不同,和飲食習慣、氣候有關。”
“The average age of menarche in the United States is about 12.5 years[1] and 13.06 ± 0.10 years in Iceland.”
“The average age of menarche has declined over the last century but the magnitude of the decline and the factors responsible remain subjects of contention.”
“Timing of menarche is influenced by both genetic and environmental factors,
especially nutritional status.”
以saber所在的年代加上当时的人民生活水平,说15岁还没有来有何奇怪:cool: :cool: