Changes

* Secretions from the female reproductive tract that serve to sexually stimulate and attract males to the female.

* Secretions from the female reproductive tract that serve to sexually stimulate and attract males to the female.

* Vaginal and urinary secretions from females in [[Oestrus Behaviour - Anatomy & Physiology|Oestrus]] smell different to the male then secretions of females not in [[Oestrus Behaviour - Anatomy & Physiology|Oestrus]].

* Vaginal and urinary secretions from females in [[Oestrus Behaviour - Anatomy & Physiology|Oestrus]] smell different to the male then secretions of females not in [[Oestrus Behaviour - Anatomy & Physiology|Oestrus]].

* Pheromone is a volatile substance released to the outside of the body and perceived by the olfactory system and/or activated by the [[Reproductive_Behaviour_-_Pre-copulatory_Behaviour_- Anatomy & Physiology#Vomeronasal_Organ|'''vomeronasal organ''']].  Releasing pheromones can cause specific behaviour in the recipient.

* Pheromone is a volatile substance released to the outside of the body and perceived by the olfactory system and/or activated by the [[Pre-copulatory Behaviour - Anatomy & Physiology#Vomeronasal_Organ|'''vomeronasal organ''']].  Releasing pheromones can cause specific behaviour in the recipient.

=== Male ===

=== Male ===