Brain Gender [1] is a book by Melissa Hines,[2] Hines graduated with an undergraduate degree from Princeton, following through with a doctorate in psychology from UCLA.

Hines demonstrates the possibilities that genetic, biological, neuroendocrine, behavioral, social, and statistical aspects of born sex affect the differences between males or females in gender roles.

[4] In the end of the book, it is concluded that the human tendency to perceive generalized gender differences is not supported by evidence.

Biology does not imply a deterministic set of gender creation or identification.

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