月经是女性发育成熟的一种重要标志,它使多少少女感到兴奋和羞涩,又给她们增添了多少烦恼和不便。作为一名女性我们有必要了解这一正常生理现象及此期的卫生保健。子宫内膜受激素的影响,发生周期性的变化,坏死脱落,血管破裂出血随阴道流出,即为月经。月经初潮年龄在12—18岁之间,月经周期平均28天。据我国文献统计,月经周期在20—35天者占70％,前后相差几天是正常的。有的妇女两个月或三个月才来一次月经,俗称“季经”,只要形成规律也属正常。每次月经一般持续3—6天,经血量在50毫升左右。正常月经期一般没有严重的不适感觉,但也有些妇女感到下腹坠胀,腰疼,轻度腹泻或便秘。此外还有不同积蓄的全身性反应,如易疲倦、发困、情绪不稳定、爱生气、头痛、头晕以 Menstruation is an important symbol of the maturity of women, it makes the number of young girls excited and shy, but also to give them added more trouble and inconvenience. As a woman, we need to understand this normal physiological phenomenon and this period of health care. Endometrial hormones, the occurrence of cyclical changes, necrosis, ruptured blood vessels with vaginal bleeding, that is, menstruation. Menstrual age at 12-18 years old, the average menstrual cycle of 28 days. According to the statistics of our country, the menstrual cycle accounts for 70% in 20-35 days, a few days before and after the normal is normal. Some women take a period of two months or three months to get a menstruation, commonly known as “quarterly”, as long as the formation of the law is normal. Each menstruation generally lasts 3-6 days, the amount of blood in about 50 ml. Normal menstrual period generally does not have serious discomfort, but some women feel lower abdominal bulge, back pain, mild diarrhea or constipation. In addition there are different savings of systemic reactions, such as fatigue, sleepy, emotional instability, love angry, headache, dizziness to