books.google.co.kr - What causes a child to grow up gay or straight? In this book, neuroscientist Simon LeVay summarizes a wealth of scientific evidence that points to one inescapable conclusion: Sexual orientation results primarily from an interaction between genes, sex hormones, and the cells of the developing body and...http://books.google.co.kr/books/about/Gay_Straight_and_the_Reason_Why_The_Scie.html?hl=ko&id=HmQFFfa03nkC&utm_source=gb-gplus-shareGay, Straight, and the Reason Why:The Science of Sexual Orientation
