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继发性闭经是指原来有月经的妇女,超过以前的3个月经周期或6个月没有月经。与原发性闭经不同(原发性闭经是与发育性染色体异常有联系),继发性闭经通常都是由后天因素所致。 由皮质中枢,下丘脑,垂体前叶,卵巢和子宫的相互作用形成月经周期的激素控制以及在正常月经周期中垂体和卵巢激素的周期性分泌已有许多描述,破坏促性腺激素和卵巢类甾醇产生的疾患及最常见的继发性闭经的病因也比较清楚,本文不再赘述。
Secondary amenorrhea refers to women who had menstrual periods, exceeding the previous 3 menstrual cycles or 6 months without menstruation. Unlike primary amenorrhea (primary amenorrhea is associated with developmental chromosomal abnormalities), secondary amenorrhea is usually caused by acquired factors. The hormonal control of the menstrual cycle and the cyclical secretion of the pituitary and ovarian hormones in the normal menstrual cycle have been described by the interaction of the cortical center, hypothalamus, anterior pituitary, ovary, and uterus, disrupting gonadotropins and ovarian sterols. The resulting disease and the most common causes of secondary amenorrhea are also relatively clear, and will not be repeated here.