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== Environmental and Social Conditions ==
 
== Environmental and Social Conditions ==
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* [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Pheromones|Pheromonal]] substances in the urine act as a stimulus to enhance the onset of puberty.
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* [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Pheromones|Pheromonal]] substances in the [[Normal_Composition_of_Urine_-_Anatomy_%26_Physiology|urine]] act as a stimulus to enhance the onset of puberty.
 
* Females reaching puberty in the presence of a male (producing the pheromones) have a greater opportunity of becoming pregnant.
 
* Females reaching puberty in the presence of a male (producing the pheromones) have a greater opportunity of becoming pregnant.
 
* Pubertal onset cannot be accelerated using [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Pheromones|pheromones]] in animals that have not achieved the appropriate metabolic body size to trigger hypothalamic responsiveness to Oestradiol (oestrogen).
 
* Pubertal onset cannot be accelerated using [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Pheromones|pheromones]] in animals that have not achieved the appropriate metabolic body size to trigger hypothalamic responsiveness to Oestradiol (oestrogen).
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