Difference between revisions of "Oestrous Cycle - Anatomy & Physiology"

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=== Pro-Oestrus ===
 
=== Pro-Oestrus ===
 +
 +
* The phase immediately preceding oestrus.
 +
* Marked increase in reproductive activity.
 +
* Follicular growth and regression of the corpus luteum of the previous cycle (in polyoestrous species).
 +
* Uterus enlarges slightly
 +
* Endometrium becomes congested and oedematous, glands show secretory activity.
 +
* Vaginal mucous becomes hyperaemic.
 +
** Increase in cell numbers in the vaginal epithelium.
 +
** Superficial layers become cornified.
 +
* The bitch shows external evidence:
 +
** Vulval oedema
 +
** Hyperaemia
 +
** Sanguinous vulval discharge
  
 
=== Oestrus ===
 
=== Oestrus ===

Revision as of 09:56, 10 September 2008

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



Introduction

Ovarian cycles are from oestrus to oestrus. Oestrus is the easily identifiable external marker.


Classification of Oestrous Cycles

Based on Vaginal Cytology

Pro-Oestrus

  • The phase immediately preceding oestrus.
  • Marked increase in reproductive activity.
  • Follicular growth and regression of the corpus luteum of the previous cycle (in polyoestrous species).
  • Uterus enlarges slightly
  • Endometrium becomes congested and oedematous, glands show secretory activity.
  • Vaginal mucous becomes hyperaemic.
    • Increase in cell numbers in the vaginal epithelium.
    • Superficial layers become cornified.
  • The bitch shows external evidence:
    • Vulval oedema
    • Hyperaemia
    • Sanguinous vulval discharge

Oestrus

Metoestrus

Dioestrus

Anoestrus

Based on Secretory Patterns of the Ovary

Follicular Phase

Luteal Phase

Comparative Oestrous Cycles

Links

Pharmacological Manipulation of Oestrous Cycles