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Oestrous Cycle Pharmacological Manipulation - Anatomy & Physiology (view source)
Revision as of 09:21, 12 September 2008
, 09:21, 12 September 2008→Progestogens
=== Progestogens ===
=== Progestogens ===
* Progesterone and its synthetic analogues are used extensively in most domestic species to synchronize oestrus.
* Exogenous progestogens act in the same way as the corpus luteum, resulting in a negative feedback effect on the anterior pituitary gland.
* This in turn results in supression of gonadotrophin release, so cyclic activity ceases.
* When the progestogen is withdrawn, the negative feedback block on the anterior pituitary gland is removed. This initiates a retun to cyclic activity.
= Manipulation of the Oestrous Cycle in Various Species =
= Manipulation of the Oestrous Cycle in Various Species =