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Oestrus Behaviour - Anatomy & Physiology (view source)
Revision as of 10:12, 11 July 2008
, 10:12, 11 July 2008→Cow
== Introduction ==
== Introduction ==
== Cow ==
== Cow ==
'''''Oestrus Detection'''''
* Oestrus detection is critical, as the absence of detection is the most important reason for delayed breeding.
* Oestrus detection is critical, as the absence of detection is the most important reason for delayed breeding.
* Groups of cows need to be examined at least 4 times a day at equally spread intervals.
* Groups of cows need to be examined at least 4 times a day at equally spread intervals.
* Average oestrus detection rates are ~ 60%, the target is >70%!
* Average oestrus detection rates are ~ 60%, the target is >70%!
'''''Signs of Oestrus'''''
* Standing to be mounted is the only truly reliable indication of oestrus.
* Other signs of oestrus may include:
** Homosexual mounting
** Holding milk
** Brawling
** Restlessness
** Chin pressing
** Swelling of vulva (also when coming into and going out of oestrus).
** Mucus discharge (also when coming into and going out of oestrus).
* Fall in body temperature prior to oestrus.
* Fall in body temperature prior to oestrus.
* Reduction in [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology|vaginal]] pH.
* Reduction in [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology|vaginal]] pH.
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== Ewe ==
== Ewe ==