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Oestrous Cycle Pharmacological Manipulation - Anatomy & Physiology (view source)
Revision as of 11:59, 12 September 2008
, 11:59, 12 September 2008→Queen
== Queen ==
== Queen ==
Suppression of oestrus may be desireable for a number of reasons, but mostly to plan litters throughout the year and allow the queen a rest from sexual activity after a litter. This allows the queen to regain condition before being bred again. If the queen is allowed to call without mating, it may lead to loss in condition due to innapetance during oestrus.
=== Physiological ===
=== Physiological ===
=== Pharmacological: Androgens ===
=== Pharmacological: Androgens ===
=== Pharmacological: Synthetic Progesterone ===
=== Pharmacological: Progestogens ===
* Used to suppress oestrus
* Injectable forms include:
** Medroxyprogesterone acetate
*** Will suppress oestrus for 7 months or more following a single injection
*** Can be repeated every 5 months to achieve permanent oestrus suppression.
** Proligestone
* Oral progestogens are more flexible.
* The most commonly used oral progestogen is Megoestrol acetate.
** Used to prevent oestrus period by administering 5mg as soon as signs of oestrus are observed.
** Postponment is achieved by administering 2.5mg daily or weekly depending on whether the treatment is in the breeding season or the period of anoestrus.
* Side effects include lethargy and weight gain, there is also a predisposal to diabetes mellitus.