'Every brain begins as a female brain'
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The extreme male brain Godwin Scerri Did you know that every brain begins as a female brain?
Up to eight weeks, every foetal brain looks female; female is nature's default gender setting. If you were to watch a female and a male brain developing via time-lapse photography, you would see their circuit diagrams being laid down according to the blueprint drafted by both genes and sex hormones.
A huge testosterone surge in the eighth week will turn this unisex brain male by killing off some cells in the sex and aggression centres. If the testosterone surge doesn't happen, the female brain continues to grow unperturbed. The foetal girl's brain cells sprout more connections in the communication centres and areas that process emotion.
Read more ... 'The extreme male brain'
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