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发育正常的女孩,从13-18岁就有了月经,一直到生殖器官发育成熟,这段生理时期就叫青春期。在这段时期里,女孩子除了有月经之外,作为第二性征的乳房已明显地得到了发育。乳房内部有腺泡和腺管,腺泡细胞有泌乳的功能,腺管是乳汁的通路。这两种结构分别在妇女卵巢分泌女性激素,俗称荷尔蒙的刺激作用下发育成长起来的。乳房发育过程中是不分泌乳汁的。青春期女孩泌乳是一种异常现象。原因有二:一是脑下垂体里发生了泌乳索性腺肿瘤;二是虽没有发生泌乳索性腺肿瘤,但由于脑下垂体细胞受下丘脑分泌的泌乳素
Normal development of girls, from 13-18 years old have menstruation, until the reproductive organs mature, this physiological period is called adolescence. During this period, in addition to having girls, menstruation, as the second sexual characteristics of the breast has been clearly developed. Acinar and duct inside the breast, acinar cells have the function of lactation, duct is the milk of the pathway. These two structures, respectively, in women’s ovarian secretion of female hormones, commonly known as the stimuli of hormones under the growth and development. Breast development is not the secretion of milk. Adolescent girls lactation is an abnormal phenomenon. There are two reasons: First, the occurrence of pituitary gland in the secretion of gonadal tumors; Second, although no occurrence of lactating gonadal tumors, but due to the pituitary gland cells secreted by the hypothalamus prolactin