[Part Introduction] The early actions of sex steroids are imperative for the maturation and/or organization of several brain structures and neural circuits. The differentiated neural circuits are then responsible for sex-typical responses following puberty when sex steroids are synthesized at adult levels by the mature gonad. Thus, it is common to refer to the permanent developmental effects of sex steroids as “organizational,” while the reversible or transient effects observed during adulthood are referred to as “activational.”
性激素的早期作用对于几种大脑结构和神经回路的成熟和/或形成组织是必不可少的。然后，当成熟的性腺在成人水平上合成性类固醇时，分化的神经回路负责青春期后的性别典型反应。因此，通常将性类固醇的永久性发育影响称为“组织效应”，而在成年期观察到的可逆或短暂影响被称为“激活效应”。
这段就是introduce的我之前post的教材摘录啦，这一部分：
组织效应和激活效应说明了的确有一些东西一旦形成了就不可逆了。所以生理意义上让性别变来变去是不可能的~