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Dog Copulatory Behaviour - Anatomy & Physiology (view source)

Revision as of 12:37, 10 July 2008

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== First Stage Coitus - The Tie ==

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* Penis achieves full '''erection''' (the ''''Tie'''')

* Lasts 1-2 minutes

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* First and second fractions of semen are ejaculated.

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* First and second fractions of semen are [[Reproductive_Behaviour_-_Copulatory_Behaviour_-_Anatomy_%26_Physiology#Ejaculation|ejaculated]].

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== The Turn ==

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* Shortly after ejaculation, the dog dismounts and turns around while lifting one hind leg over the bitch.

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* Shortly after [[Reproductive_Behaviour_-_Copulatory_Behaviour_-_Anatomy_%26_Physiology#Ejaculation|ejaculation]], the dog dismounts and turns around while lifting one hind leg over the bitch.

* The male and female remain 'tied' because the '''bulbus glandis''' of the penis remains engorged with blood.

* Contractions of muscles near the base of the penis prevent venous outflow of blood from the bulbus glandis.

* Sphincter muscles of the '''vulva''' constrict

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** Compresses dorsal veins of the penis.

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** Compresses '''dorsal veins''' of the penis.

** Prevents venous outflow.

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* After the turn,they stand with their hind quarters in contact and their heads facing opposite directions.

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* Third fraction of semen is ejaculated.

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* Third fraction of semen is [[Reproductive_Behaviour_-_Copulatory_Behaviour_-_Anatomy_%26_Physiology#Ejaculation|ejaculated]].

* Lasts 5-45 minutes

* Encourages uterine rather than vaginal insemination.

Lwilkie

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