Early menstruation for a 13-year-old girl may be normal, or it may be caused by endocrine disorders.
It is normal for menstruation to be 7 days early or late. In addition, 13-year-old girls, ovaries and other reproductive systems are not yet mature, the body’s sex hormone levels are not stable, the menstrual period will be a little irregular, is a normal phenomenon.
However, if you often stay up late, study stress, etc., resulting in endocrine disorders, menstrual irregularities.
13 girls who often have early menstruation, it is recommended to consult the obstetrics and gynecology clinic as soon as possible, can be further hormone six, ultrasound and other tests to determine the cause of the disease, under the guidance of the doctor to actively treat.