Changes

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

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

* Lasts 1-2 minutes

* Lasts 1-2 minutes

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

* First and second fractions of semen are [[Reproductive_Behaviour_-_Copulatory_Behaviour_- Anatomy & Physiology#Ejaculation|ejaculated]].

* Never attempt to break the tie, since the penis is now too large to be withdrawn from the vagina of the bitch.  Attempts to separate them with force will result in injury.

* Never attempt to break the tie, since the penis is now too large to be withdrawn from the vagina of the bitch.  Attempts to separate them with force will result in injury.

== The Turn ==

== The Turn ==

* 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.

* Shortly after [[Reproductive_Behaviour_-_Copulatory_Behaviour_- Anatomy & 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.

* 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.

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

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

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

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

* Third fraction of semen is [[Reproductive_Behaviour_-_Copulatory_Behaviour_- Anatomy & Physiology#Ejaculation|ejaculated]].

* Lasts 5-45 minutes

* Lasts 5-45 minutes

* Encourages uterine rather than vaginal insemination.

* Encourages uterine rather than vaginal insemination.

* Dog steadily ejaculates up to 30ml '''seminal fluid'''.

* Dog steadily ejaculates up to 30ml '''seminal fluid'''.

** Delivered through the [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|Cervix]] to the [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology|Uterus]].

** Delivered through the [[Female_Reproductive_Tract_-The_Cervix_- Anatomy & Physiology|Cervix]] to the [[Female_Reproductive_Tract_-The_Uterus_- Anatomy & Physiology|Uterus]].

** Forces the sperm-rich fraction into the [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology|Uterus]].

** Forces the sperm-rich fraction into the [[Female_Reproductive_Tract_-The_Uterus_- Anatomy & Physiology|Uterus]].

[[Category:Reproductive System]]

[[Category:Reproductive System]]