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正常女性绝大多数在13～15岁即来月经。月经的来潮标志若青春期的开始。如果18岁以后月经尚未来潮者,称为原发性闭经;过去月经正常,现在停经三个月以上者称为继发性闭经。妊娠期、哺乳期、绝经期妇女月经停止均属正常生理现象,称生理性闭经。还有些妇女虽有月经,但
The vast majority of normal women in the 13 to 15 years of age to menstruation. Menstrual cramps if adolescence begins. If the menstruation after 18 years of age has not yet come, known as primary amenorrhea; normal menstruation in the past, now menopause for more than three months are referred to as secondary amenorrhea. Pregnancy, lactation, menopausal women stop menstruation is a normal physiological phenomenon, said the physiological amenorrhea. Although some women have menstruation, however