人的一生中会在许多方面发生变化,如:身体发育,长高长胖,抑或“女大十八变,越变越好看”,但唯独性别是不可能改变的。另外,人对自己的许多方面可以感到不满意甚至为之自卑,如:容貌、体态、肤色或存在着的某种生理缺陷,但不会拒绝承认和接受自己固有的性别。男性抑或女性,是早在胚胎期就已决定,出生时就被确认的问题。从外显器官到日后内分泌系统的发展都 A person’s life changes in many ways, such as: physical development, growth and gain weight, or “female big change, getting better and better,” but only sex can not be changed. In addition, people may feel dissatisfied or even inferior to many aspects of their own, such as appearance, body condition, skin color or some kind of physiological defects that exist, but will not refuse to acknowledge and accept their own inherent gender. Male or female, as early as the embryonic period has been decided, was confirmed at birth. From the external organs to the future development of the endocrine system are