We review examples of sex differences that emerge during adolescence that fall into categories discussed, e.g., in [10]. We define dimorphic sex differences as both the behavioral/physiological output, and its underlying neural mechanism, diverge by sex. Convergent sex differences are when either the same neural mechanism results in divergent outputs (left), or divergent neural mechanisms support a convergent output (right). Quantitative sex differences are when both the neural mechanism and output are the same, but either the mechanism or output is greater in one sex.