![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | reproduction, sperm and, 25
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | reproductive health and environmental estrogens, 19
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | reproductive success and testosterone, 122124, 123
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | "rhino" behavior in, 107, 108, 111
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | scars and manly image, 72
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | smiling and, 69, 69 n , 128, 157, 158159, 162
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | social dominance and, 198199
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | spatial skills, 5158
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | testosterone levels across the life span, 1516, 16 , 17
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | testosterone levels, various population groups, 17, 17
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | thinking and testosterone, 4243
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | verbal skills, 42, 4647
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![](/files/03/73/87/f037387/public/a174427bdf448e53ce20e149b0ddeee1.gif) | Mental rotation tests, 53
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