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==Introduction==

==Introduction==

The ovary is the female Gonad homologous to the male Testes. It is usually a paired organ in domestic species, but in the bird only the left Ovary is present.  The structures found within the ovary are undergoing constant changes throughout the oestrus cycle from the [[Follicles_- Anatomy & Physiology|Follicles]] containing [[Oogenesis - Anatomy & Physiology|Oocytes]], to the formation of [[Corpus Haemorrhagicum - Anatomy & Physiology|Corpus Haemorrhagicum]], [[Corpus Luteum - Anatomy & Physiology|Corpus Luteum]], and finally [[Corpus_Luteum_-_Anatomy_&_Physiology|Corpus Albicans]]. Ovaries are ellipsoidal in shape with an irregular surface due to the projection of dominant follicles and corpora lutea. These irregularities are absent in the mare due to the cortex and medulla being reversed with ovulation only occuring from the ovulation fossa. They are greatest in [[Litter Sizes - Anatomy & Physiology|Polytocious]] animals such as the sow due to many dominant follicles, and so corpora lutea, developing at once.

The ovary is the female Gonad homologous to the male Testes. It is usually a paired organ in domestic species, but in the bird only the left Ovary is present.  The structures found within the ovary are undergoing constant changes throughout the oestrus cycle from the [[Follicles_- Anatomy & Physiology|Follicles]] containing [[Oogenesis - Anatomy & Physiology|Oocytes]], to the formation of [[Corpus Haemorrhagicum - Anatomy & Physiology|Corpus Haemorrhagicum]], [[Corpus Luteum - Anatomy & Physiology|Corpus Luteum]], and finally [[Corpus_Luteum_-_Anatomy_&_Physiology|Corpus Albicans]]. Ovaries are ellipsoidal in shape with an irregular surface due to the projection of dominant follicles and corpora lutea. These irregularities are absent in the mare due to the cortex and medulla being reversed with ovulation only occuring from the ovulation fossa. They are greatest in [[Litter Sizes - Anatomy & Physiology|Polytocious]] animals such as the sow due to many dominant follicles, and so corpora lutea, developing at once.

==== The Mare ====

==== The Mare ====

[[Image:Mare Ovary.jpg|thumb|right|150px|The Ovaries of a Mare showing the Ovulation Fossa- Courtesy of A.Crook, Copyright RVC 2008]]

[[Image:Mare Ovary.jpg|thumb|right|200px|The Ovaries of a Mare showing the Ovulation Fossa- Courtesy of A.Crook, Copyright RVC 2008]]

* The structure of the ovary is reversed.

* The structure of the ovary is reversed.

* The cortex is in the centre, follicles develop here.

* The cortex is in the centre, follicles develop here.

==Histology==

==Histology==

[[Image:Ovary low magnification.jpg|thumb|right|150px|Histological Section of a Rabbit Ovary under Low Power- Courtesy of J.Bredl, Copyright RVC 2008]]

[[Image:Ovary low magnification.jpg|thumb|right|200px|Histological Section of a Rabbit Ovary under Low Power- Courtesy of J.Bredl, Copyright RVC 2008]]

=== Stroma ===

=== Stroma ===

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[[Category:Female Reproduction]]

[[Category:Female Reproduction]]