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按人体生长发育一般规律,女孩子在10～11岁进入青春发育期,伴随着体内各种内分泌激素的急剧变化,身高等形态指标大幅度增长,骨骼加速钙化,性发育启动。女子性成熟的重要标志之一是子宫内膜周期性出血,即形成月经,月经首次来潮称为初潮。女孩初潮年龄,一般波动在10～16岁之间,大部分发生于13～14岁。但有的女孩性发育开始很早,
According to the general law of human growth and development, girls in the 10 to 11 years of age into the puberty, accompanied by rapid changes in the body a variety of endocrine hormones, height and other morphological indicators increased significantly accelerated bone calcification, sexual development started. One of the important signs of sexual maturity of women is a period of endometrial bleeding, that is, the formation of menstruation, the first menstrual cramps called menarche. Girls age of menarche, the general fluctuations in 10 to 16 years old, most occurred in 13 to 14 years old. However, some girls start early sexual development,