Changes

* Most birds have only left ovary but 2 ovaries are typical of many raptors.

* Most birds have only left ovary but 2 ovaries are typical of many raptors.

* '''Left Ovary''' lies caudal to the [[Adrenal_Glands_- Anatomy & Physiology|Adrenal Gland]], close to the cranial tip of the [[Macroscopic Renal Anatomy - Anatomy & Physiology#Common Anatomy|Kidney]].

* '''Left Ovary''' lies caudal to the [[Adrenal_Glands_- Anatomy & Physiology|Adrenal Gland]], close to the cranial tip of the [[Renal Anatomy - Anatomy & Physiology#Common Anatomy|Kidney]].

* Consists of:

* Consists of:

** '''Medulla''': vascular with nerve fibres and smooth muscle

** '''Medulla''': vascular with nerve fibres and smooth muscle

* Suspended by the '''mesovarium'''.

* Suspended by the '''mesovarium'''.

* Blood supply from the '''cranial renal artery'''

* Blood supply from the '''cranial renal artery'''

** Artery is very short, making ovariectomy very difficult with risk of [[Haemorrhage - Pathology|haemorrhage]].

** Artery is very short, making ovariectomy very difficult with risk of [[Haemorrhage|haemorrhage]].

* Contains from 500 to several thousand primary [[Oogenesis - Anatomy & Physiology|oocytes]].

* Contains from 500 to several thousand primary [[Oogenesis - Anatomy & Physiology|oocytes]].

* [[The_Ovary_-_Follicles_- Anatomy & Physiology|Follicles]] are '''pedunculated''', suspended by a stalk containing smooth muscle that has a rich vascular and nerve supply.

* [[Follicles - Anatomy & Physiology|Follicles]] are '''pedunculated''', suspended by a stalk containing smooth muscle that has a rich vascular and nerve supply.

** Large, pendulous [[The_Ovary_-_Follicles_- Anatomy & Physiology|Follicles]] may contact the [[Avian_Digestive_Tract_- Anatomy & Physiology|stomach]], [[Spleen_- Anatomy & Physiology|spleen]] and [[Avian_Intestines_- Anatomy & Physiology|intestines]].

** Large, pendulous [[Follicles - Anatomy & Physiology|Follicles]] may contact the [[Avian_Digestive_Tract_- Anatomy & Physiology|stomach]], [[Spleen_- Anatomy & Physiology|spleen]] and [[Avian_Intestines_- Anatomy & Physiology|intestines]].

** Each consists of a large, yolk-filled oocyte surrounded by a highly vascular follicular wall.

** Each consists of a large, yolk-filled oocyte surrounded by a highly vascular follicular wall.

* Shortly before [[Exotics_-_Breeding%2C_Ovulation_and_Oviposition_- Anatomy & Physiology#Ovulation|ovulation]], a devascularized white band (stigma) appears opposite the stalk, indicating where the wall will rupture at [[Exotics_-_Breeding%2C_Ovulation_and_Oviposition_- Anatomy & Physiology#Ovulation|ovulation]].

* Shortly before [[Exotics_-_Breeding%2C_Ovulation_and_Oviposition_- Anatomy & Physiology#Ovulation|ovulation]], a devascularized white band (stigma) appears opposite the stalk, indicating where the wall will rupture at [[Exotics_-_Breeding%2C_Ovulation_and_Oviposition_- Anatomy & Physiology#Ovulation|ovulation]].

* The empty follicle (calix) regresses following [[Exotics_-_Breeding%2C_Ovulation_and_Oviposition_- Anatomy & Physiology#Ovulation|ovulation]] and disappears in a few days.

* The empty follicle (calix) regresses following [[Exotics_-_Breeding%2C_Ovulation_and_Oviposition_- Anatomy & Physiology#Ovulation|ovulation]] and disappears in a few days.

* No [[The_Ovary_-Corpus_Luteum_- Anatomy & Physiology|Corpus Luteum]] is required, since there is no embryo to maintain as there is in mammals.

* No [[Corpus Luteum - Anatomy & Physiology|Corpus Luteum]] is required, since there is no embryo to maintain as there is in mammals.

== Oviduct ==

== Oviduct ==

* Occupies the left,dorsal part of the body cavity.

* Occupies the left,dorsal part of the body cavity.

* Related to the [[Macroscopic Renal Anatomy - Anatomy & Physiology#Common Anatomy|Kidney]], [[Avian_Intestines_- Anatomy & Physiology|intestines]] and [[Gizzard_- Anatomy & Physiology|gizzard]].

* Related to the [[Renal Anatomy - Anatomy & Physiology#Common Anatomy|Kidney]], [[Avian_Intestines_- Anatomy & Physiology|intestines]] and [[Gizzard_- Anatomy & Physiology|gizzard]].

* Massive coiled structure approximately twice body length when fully functional..

* Massive coiled structure approximately twice body length when fully functional..

** Much reduced in juveniles and during the non-laying period.

** Much reduced in juveniles and during the non-laying period.

[[Category:Avian Reproduction]]

[[Category:Avian Reproduction]]