女人的一生要经历多个生理阶段。除胎儿期、新生儿期、儿童期外,女性青春期、生育期、更年期及老年期等各个阶段的生理状况都与雌激素的分泌密切相关。青春期:一般女性自12～13岁起,卵巢开始分泌雌激素,出现月经初潮,生殖器官开始成熟,乳房开始发育,宣告女性开始进入青春期。性成熟期:自18岁开始,大约维持30年左右。这时卵巢功能成熟, A woman’s life to go through multiple physiological stages. In addition to fetal, neonatal, childhood, women adolescent, growth period, menopause and the elderly and other stages of the physiological conditions are closely related with the secretion of estrogen. Adolescence: The average woman from 12 to 13 years old, the ovary began to secrete estrogen, there menarche, reproductive organs began to mature, the breast began to develop, proclaimed that women began to enter adolescence. Sexual maturity: since the age of 18, about 30 years or so. At this time ovarian function is mature,