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Male rivalry increases when females at most fertile, say researchers

larly in humans, rated dominance increases when the female is most fertile. What is interesting here is that male behaviour is determined by that of the females; men become more wary of masculine-looking men only when the females facial preferences begin to shift prior to ovulation.

"Face shape and structure are good indicators of dominance. Men with large eyes, rounded chin and full lips, are viewed as more feminine and are chosen as long-term partners. They are not, however, seen as dominant. During the female's most fertile phase, she tends to prefer faces that indicate high testosterone levels, which indicate good genes; masculine faces reflect these qualities."


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Source:University of Liverpool


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