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=== Endocrine Changes during the Oestrous Cycle ===
 
=== Endocrine Changes during the Oestrous Cycle ===
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* Just before the onset of oestrus, there is a rise in oestrogens, particularly oestradiol 17β.
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* This is follwed by an LH surge, which peaks at ~14 hours before ovulation.
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* At the same time as LH peaks, there is a rise in FSH.
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* There is also a second peak in FSH two days after ovulation.
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* Progesterone concentrations closely follow changes in the corpora lutea.
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** Maximum progesterone concentrations are lower than those of the cow.
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* Prolactin fluctuates throughout the oestrous cycle.
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** Concentrations rise during oestrus and ovulation
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** 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]]
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