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* Reproductive behaviour can only take place if the neurons in the [[Endocrine_System_-_Hypothalamus_-_Anatomy_%26_Physiology#Hypothalamus|hypothalamus]] have been sensitized to respond to sensory signals.
 
* Reproductive behaviour can only take place if the neurons in the [[Endocrine_System_-_Hypothalamus_-_Anatomy_%26_Physiology#Hypothalamus|hypothalamus]] have been sensitized to respond to sensory signals.
         
== Male ==
 
== Male ==
      
* Testosterone is aromatized to oestradiol in the brain.  Oestradiol promotes reproductive behaviour.   
 
* Testosterone is aromatized to oestradiol in the brain.  Oestradiol promotes reproductive behaviour.   
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== Female ==
 
== Female ==
      
* Only experiences high oestradiol during the '''follicular phase'''.
 
* Only experiences high oestradiol during the '''follicular phase'''.
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