Difference between revisions of "Corpus Luteum - Anatomy & Physiology"

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* When the dominant antral follicle ovulates, slight localised haemorrhage occurs at the site of ovulation and fills the former cavity.
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* When the dominant antral [[The Ovary_-_Follicles_-_Anatomy_%26_Physiology|follicle]] ovulates, slight localised haemorrhage occurs at the site of ovulation and fills the former cavity.
 
* The small amount of bloody tissue can be observed by the naked eye.
 
* The small amount of bloody tissue can be observed by the naked eye.
 
* Loss of fluid from the antral cavity causes the follicle to collapse into many folds.
 
* Loss of fluid from the antral cavity causes the follicle to collapse into many folds.
* As a result, some granulosal and thecal layers are pushed into the apex of the ruptured follicle.
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* As a result, some granulosal and thecal layers are pushed into the apex of the ruptured [[The Ovary_-_Follicles_-_Anatomy_%26_Physiology|follicle]].
 
* This protrusion of tissue and ruptured blood vessels forms a structure known as the '''Corpus Haemorrhagicum'''.  
 
* This protrusion of tissue and ruptured blood vessels forms a structure known as the '''Corpus Haemorrhagicum'''.  
 
* Following this, the theca interna and granulosa cells differentiate into large and small luteal cells.  
 
* Following this, the theca interna and granulosa cells differentiate into large and small luteal cells.  

Revision as of 08:42, 10 September 2008

Anatomy and PhysiologyWikiAnt and Phys Banner.png
()Map REPRODUCTIVE SYSTEM (Map)
FEMALE REPRODUCTIVE TRACT
THE OVARY



  • When the dominant antral follicle ovulates, slight localised haemorrhage occurs at the site of ovulation and fills the former cavity.
  • The small amount of bloody tissue can be observed by the naked eye.
  • Loss of fluid from the antral cavity causes the follicle to collapse into many folds.
  • As a result, some granulosal and thecal layers are pushed into the apex of the ruptured follicle.
  • This protrusion of tissue and ruptured blood vessels forms a structure known as the Corpus Haemorrhagicum.
  • Following this, the theca interna and granulosa cells differentiate into large and small luteal cells.
  • As the blood is resorbed, a solid Corpus Luteum is formed by proliferation of granulosa and theca intera cells as well as blood vessels. This remains on the surface of the ovary.
  • In the non-pregnant animal, corpora lutea are transient structures.
  • Cyclic corpora lutea undergo proliferation and vascularisation directly after ovulation.
  • The corpora lutea then regress and degenerate into a connective tissue scar, the Corpus Albicans.
  • If the ovum is fertilised, the corpus luteum remains fully developed and active throughout at least part of the pregnancy.
  • Corpora lutea produce progesterone.
  • Progesterone prepares and maintains the uterus for implantation of the fertilised ovum.

Corpus Luteum Formation

=== Corpus Luteum Regression ===