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Oestrous Cycle - Anatomy & Physiology (view source)
Revision as of 09:35, 11 September 2008
, 09:35, 11 September 2008→Endocrine Changes during the Oestrous Cycle
=== Endocrine Changes during the Oestrous Cycle ===
=== Endocrine Changes during the Oestrous Cycle ===
* Just before the onset of oestrus, there is a rise in oestrogens, particularly oestradiol 17β.
* This is follwed by an LH surge, which peaks at ~14 hours before ovulation.
* At the same time as LH peaks, there is a rise in FSH.
* There is also a second peak in FSH two days after ovulation.
* Progesterone concentrations closely follow changes in the corpora lutea.
** Maximum progesterone concentrations are lower than those of the cow.
* Prolactin fluctuates throughout the oestrous cycle.
** Concentrations rise during oestrus and ovulation
** This pattern reflects the role of prolactin in formation of the corpus luteum.
= Links =
= Links =
[[Oestrous_Cycle_-Pharmacological_Manipulation_of_Oestrous_Cycles_-_Anatomy_%26_Physiology|Pharmacological Manipulation of Oestrous Cycles]]
[[Oestrous_Cycle_-Pharmacological_Manipulation_of_Oestrous_Cycles_-_Anatomy_%26_Physiology|Pharmacological Manipulation of Oestrous Cycles]]