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Oestrous Cycle - Anatomy & Physiology (view source)
Revision as of 15:36, 11 September 2008
, 15:36, 11 September 2008→Mating and Ovulation
=== Mating and Ovulation ===
=== Mating and Ovulation ===
* The queen is an induced ovulator, so mating is important in triggering ovulation.
* The queen is an induced ovulator, so [[Reproductive_Behaviour_-_Copulatory_Behaviour_Cat_-_Anatomy_%26_Physiology|mating]] is important in triggering ovulation.
* There are receptors in the vulva, which are stimualated by copulation.
* There are receptors in the vulva, which are stimualated by [[Reproductive_Behaviour_-_Copulatory_Behaviour_Cat_-_Anatomy_%26_Physiology|copulation]].
* This results in release of LH fromt he anterior pituitary gland.
* This results in release of LH fromt he anterior pituitary gland.
* Only 50% of queens ovulate after a single mating, because multiple ovulations are usually required for adequate LH release.
* Only 50% of queens ovulate after a single [[Reproductive_Behaviour_-_Copulatory_Behaviour_Cat_-_Anatomy_%26_Physiology|mating]], because multiple ovulations are usually required for adequate LH release.
* The ovulatory LH surge begins within minutes of coitus.
* The ovulatory LH surge begins within minutes of coitus.
* LH peaks within 2 hours, then returns to basal levels within 8 hours.
* LH peaks within 2 hours, then returns to basal levels within 8 hours.
* Further matings before the peak in LH will result in further LH release.
* Further [[Reproductive_Behaviour_-_Copulatory_Behaviour_Cat_-_Anatomy_%26_Physiology|matings]] before the peak in LH will result in further LH release.
* After multiple matings over 4 hours or more, further matings will not result in any further LH release.
* After [[Reproductive_Behaviour_-_Copulatory_Behaviour_Cat_-_Anatomy_%26_Physiology|multiple matings]] over 4 hours or more, further matings will not result in any further LH release.
** Due to depletion of the pituitary pool of LH, or the pituitary becoming refractory to further GnRH stimulation.
** Due to depletion of the pituitary pool of LH, or the pituitary becoming refractory to further GnRH stimulation.
* Once significant quantities of LH are reached, all ripe follicles will rupture (all or nothing response).
* Once significant quantities of LH are reached, all ripe follicles will rupture (all or nothing response).