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Oestrous Cycle - Anatomy & Physiology (view source)
Revision as of 11:32, 10 September 2008
, 11:32, 10 September 2008→Dioestrus
=== Dioestrus ===
=== Dioestrus ===
* The corpus luteum is present on the ovary and secreting large amounts of progesterone.
* Longest phase of the oestrous cycle, which usually laste 10-14 days in polyoestrous females.
* The corpus luteum is present on the ovary and secreting large amounts of progesterone. The duration of this phase is directly related to the time that the corpus luteum remains functional.
* High progesterone levels prompt the uterus to prepare a suitable environment for development of the embryo, and eventual attachment of the conceptus to the endometrium (implantation).
* Uterine glands undergo hyperplasia and hypertrophy.
* Uterine glands undergo hyperplasia and hypertrophy.
* Cervix becomes constricted
* Cervix becomes constricted
* Secretions of the tract are scant and sticky.
* Secretions of the tract are scant and sticky.
* Vaginal mucosa becomes pale.
* Vaginal mucosa becomes pale.
* Ends with the regression of the corpus luteum (luteolysis).
=== Anoestrus ===
=== Anoestrus ===