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月经来潮是女孩进入青春期的重要标志,大多数女孩12~14岁来月经,第一次来月经称为初潮。月经的周期一般为28~30天,每次来3~7天,出血量为3~60毫升。女孩月经来潮时一般没有特殊症状,有少数女孩有轻微的下腹、乳房胀痛,腰骶坠胀,神疲乏力,心烦,尿频等,但不影响生活和学习,不用担心。月经初潮的早晚,和身体健康状况、情绪、营养等有一定的关系,女孩早至9岁、晚到18~19岁来月经,如果没有其他异常情况,
Menstrual cramps is an important symbol of the girl into adolescence, most girls 12 to 14 years of age, the first menarche called menarche. Menstrual cycle is generally 28 to 30 days, each to 3 to 7 days, the amount of bleeding 3 to 60 ml. Menstrual cramps girls generally no special symptoms, a small number of girls have a slight lower abdomen, breast pain, lumbosacral bulge, Shenpi fatigue, upset, frequent urination, but does not affect life and learning, do not worry. Menstruation sooner or later, and physical health, emotions, nutrition, etc. have a certain relationship, the girl as early as 9 years old, 18 to 19 years old to menstruation late, if there are no other abnormalities,