Changes

== Environmental and Social Conditions ==

== Environmental and Social Conditions ==

* Pheromonal substances in the urine act as a stimulus to enhance the onset of puberty.

* [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Pheromones|Pheromonal]] substances in the 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 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).