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Chapter One The differences
Chapter Two The Birth of difference
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achievement aggression American attitudes baby better bias biological boys brain organisation brain sex Camilla Benbow cent child chromosomes dominance Dorner emotional ences equal experience explain feel female brain female hormone female pattern feminine functions G. D. and Nias Garai gender genetically girls greater hemisphere homosexual hormone levels human human sexual Hutt hypothalamus injections involving J. E. and Scheinfeld K. B. and Hoyenga kibbutz Kimura less male and female male brain male hormone male or female marriage masculine mathematical mating centre McGuinness men's menstrual cycle mother Murstein natural oestrogen physical play problem progesterone Psychology puberty recognise reference in Chapter Reinisch relationships Restak role Rossi scientific scientists scores sensitivity sex differences sex organs sexual behaviour sexual differentiation social society spatial ability specific structure success Symons testosterone testosterone levels tests things tion Turner's syndrome verbal Wilson Witleson woman womb women