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− | {{toplink
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− | |backcolour =EED2EE
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− | |linkpage =Reproductive System - Anatomy & Physiology
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− | |linktext =Reproductive System
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− | |maplink = Reproductive System (Content Map) - Anatomy & Physiology
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− | |pagetype =Anatomy
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− | |sublink1=Reproductive System - Anatomy & Physiology#Reproductive Behaviour
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− | |subtext1=REPRODUCTIVE BEHAVIOUR
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− | }}
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− | <br>
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| == Introduction == | | == Introduction == |
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| Oestrus is the period of sexual receptivity in a female, commonly referred to as 'heat'. | | Oestrus is the period of sexual receptivity in a female, commonly referred to as 'heat'. |
− | For further infomation on oestrous cyclicity, follow [[Female Reproductive_Tract_-Oestrous_Cycle_-_Anatomy_%26_Physiology|this link]]. | + | For further infomation on oestrous cyclicity, follow [[Oestrous_Cycle_- Anatomy & Physiology|this link]]. |
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| === Aids to Improve Oestrus Detection === | | === Aids to Improve Oestrus Detection === |
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− | For methods of oestrous synchronisation and oestrus induction click [[Oestrous_Cycle_-Pharmacological_Manipulation_of_Oestrous_Cycles_-_Anatomy_%26_Physiology|here]]. | + | For methods of oestrous synchronisation and oestrus induction click [[Oestrous Cycle Pharmacological Manipulation - Anatomy & Physiology|here]]. |
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| ==== Tail Paint ==== | | ==== Tail Paint ==== |
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| ==== Other Methods ==== | | ==== Other Methods ==== |
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− | * Detection of a [[The_Ovary_-_Follicles_-_Anatomy_%26_Physiology|'''follicle''']] and absence of a [[The_Ovary_-Corpus_Luteum_-_Anatomy_%26_Physiology|'''corpus luteum''']] by palpation or ultrasound examination of [[Female_Reproductive_Tract_-The_Ovary_-_Anatomy_%26_Physiology|ovaries]]. | + | * Detection of a [[Follicles - Anatomy & Physiology|'''follicle''']] and absence of a [[Corpus_Luteum_- Anatomy & Physiology|'''corpus luteum''']] by palpation or ultrasound examination of [[Ovary_- Anatomy & Physiology|ovaries]]. |
− | * Crystallisation patterns in [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology|vaginal]] mucus. | + | * Crystallisation patterns in [[Vagina and Vestibule - Anatomy & Physiology|vaginal]] mucus. |
| * Fall in body temperature prior to oestrus. | | * Fall in body temperature prior to oestrus. |
− | * Reduction in [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology|vaginal]] pH. | + | * Reduction in [[Vagina and Vestibule - Anatomy & Physiology|vaginal]] pH. |
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| === Signs of Oestrus === | | === Signs of Oestrus === |
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− | * Stands for a boar producing lots of [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Pheramones|pheromones]] in [[Oral_Cavity_-_Salivary_Glands_-_Anatomy_%26_Physiology#Saliva|saliva]]. | + | * Stands for a boar producing lots of [[Attractivity Behaviour - Anatomy & Physiology#Pheramones|pheromones]] in [[Salivary_Glands_-_Anatomy_&_Physiology#Saliva|saliva]]. |
| * Stands very firmly to be mounted, hence the 'back pressure test' is very reliable. | | * Stands very firmly to be mounted, hence the 'back pressure test' is very reliable. |
| ** But, becomes refractory after 10 minutes standing, then no visible response for 1-2 hours. | | ** But, becomes refractory after 10 minutes standing, then no visible response for 1-2 hours. |
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| *** Nosing | | *** Nosing |
| *** Mounting other females | | *** Mounting other females |
− | ** Increase in [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology|vaginal]] mucous (requires digital examination) | + | ** Increase in [[Vagina and Vestibule - Anatomy & Physiology|vaginal]] mucous (requires digital examination) |
| *** Usually more pronounced in guilts than sows. | | *** Usually more pronounced in guilts than sows. |
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| * Oestrous detection is a problem because mares not in oestrus can cause significant damage to a stallion. | | * Oestrous detection is a problem because mares not in oestrus can cause significant damage to a stallion. |
− | * May be a slight [[Oedema - Pathology|oedema]] of the vulva and a mucoid discharge. | + | * May be a slight [[Oedema|oedema]] of the vulva and a mucoid discharge. |
| * Generally mares return to oestrous about 6-10 days after foaling. | | * Generally mares return to oestrous about 6-10 days after foaling. |
− | ** Called a ''''foal heat'''' because often the foal develops [[Intestine Diarrhoea - Pathology|diarrhoea]] at this time, which makes the oestrus easy to detect. | + | ** Called a ''''foal heat'''' because often the foal develops [[Diarrhoea|diarrhoea]] at this time, which makes the oestrus easy to detect. |
| *** Fertility may not be high at 'foal heat' oestrus. | | *** Fertility may not be high at 'foal heat' oestrus. |
| * Mares with an older foal at foot may not show signs of oestrus, as they are protective of the foal (''''foal shy''''). | | * Mares with an older foal at foot may not show signs of oestrus, as they are protective of the foal (''''foal shy''''). |
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| * Mare will stand as if to urinate, lift her tail and lean her hindquarters toward the stallion. | | * Mare will stand as if to urinate, lift her tail and lean her hindquarters toward the stallion. |
| * Mare repeatedly exposes her clitoris ('winking') | | * Mare repeatedly exposes her clitoris ('winking') |
− | * If the mare is in oestrus, the stallion usually demonstrates a [[Reproductive_Behaviour_-_Pre-copulatory_Behaviour_-_Anatomy_%26_Physiology#Flehmen_Response|Flehmen response]]. | + | * If the mare is in oestrus, the stallion usually demonstrates a [[Pre-copulatory Behaviour - Anatomy & Physiology#Flehmen_Response|Flehmen response]]. |
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| ==== Ultrasound ==== | | ==== Ultrasound ==== |
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− | * Detection of a [[The_Ovary_-_Follicles_-_Anatomy_%26_Physiology|'''follicle''']] and absence of a [[The_Ovary_-Corpus_Luteum_-_Anatomy_%26_Physiology|'''corpus luteum''']] by palpation or ultrasound examination of [[Female_Reproductive_Tract_-The_Ovary_-_Anatomy_%26_Physiology|ovaries]]. | + | * Detection of a [[Follicles - Anatomy & Physiology|'''follicle''']] and absence of a [[Corpus Luteum - Anatomy & Physiology|'''corpus luteum''']] by palpation or ultrasound examination of [[Ovary_- Anatomy & Physiology|ovaries]]. |
| * Demonstration of follicle size, follicle wall thickening and follicle wall softening on ultrasound. | | * Demonstration of follicle size, follicle wall thickening and follicle wall softening on ultrasound. |
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| ==== Vaginal and Cervical Examination ==== | | ==== Vaginal and Cervical Examination ==== |
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− | By visual; examination of the [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology|vagina]] and [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|cervix]] using an illuminated speculum, it is possible to detect the preovulation period. | + | By visual; examination of the [[Vagina and Vestibule - Anatomy & Physiology|vagina]] and [[Cervix_- Anatomy & Physiology|cervix]] using an illuminated speculum, it is possible to detect the preovulation period. |
− | * In dioestrus, the [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|cervix]] is small, constricted and firm. | + | * In dioestrus, the [[Cervix_- Anatomy & Physiology|cervix]] is small, constricted and firm. |
− | * In dioestrus, the [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|cervix]] and [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology|vagina]] are pale pink and mucus is scanty and sticky. | + | * In dioestrus, the [[Cervix_- Anatomy & Physiology|cervix]] and [[Vagina and Vestibule - Anatomy & Physiology|vagina]] are pale pink and mucus is scanty and sticky. |
− | * During oestrus, there is a gradual increase in vascularity of the genital tract and relaxation of the [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|cervix]] with dilation of the cervical os. | + | * During oestrus, there is a gradual increase in vascularity of the genital tract and relaxation of the [[Cervix_- Anatomy & Physiology|cervix]] with dilation of the cervical os. |
− | * Approaching [[The_Ovary_-_Ovulation_-_Anatomy_%26_Physiology|ovulation]], the [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|cervix]] becomes very relaxed and its protrusion can be seen on the [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology|vaginal]] floor. | + | * Approaching [[Ovulation - Anatomy & Physiology|ovulation]], the [[Cervix_- Anatomy & Physiology|cervix]] becomes very relaxed and its protrusion can be seen on the [[Vagina and Vestibule - Anatomy & Physiology|vaginal]] floor. |
− | ** [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|Cervical]] folds are oedematous | + | ** [[Cervix_- Anatomy & Physiology|Cervical]] folds are oedematous |
− | * [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology|Vaginal]] folds glisten with clear lubricant mucus. | + | * [[Vagina and Vestibule - Anatomy & Physiology|Vaginal]] folds glisten with clear lubricant mucus. |
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| == Bitch == | | == Bitch == |
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− | * Long period of '''proestrus''' where the bitch is [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology|attractive]], but will not allow mating. | + | * Long period of '''proestrus''' where the bitch is [[Attractivity Behaviour - Anatomy & Physiology|attractive]], but will not allow mating. |
| ** Characterized by: | | ** Characterized by: |
| *** Vulval swelling | | *** Vulval swelling |
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| ** Deviation of the tail | | ** Deviation of the tail |
| ** Discharge becomes paler in colour | | ** Discharge becomes paler in colour |
− | ** Reduction in vulval [[Oedema - Pathology|oedema]] | + | ** Reduction in vulval [[Oedema|oedema]] |
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− | * Poor relationship between time of [[The_Ovary_-_Ovulation_-_Anatomy_%26_Physiology|ovulation]] and external appearance. | + | * Poor relationship between time of [[Ovulation - Anatomy & Physiology|ovulation]] and external appearance. |
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| === Clinical Methods and Assessments for Oestrus Detection === | | === Clinical Methods and Assessments for Oestrus Detection === |
| * Assessment of vulval softening | | * Assessment of vulval softening |
− | * Assessment of [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology#Histology_and_Innervation|vaginal epithelial cells]] | + | * Assessment of [[Vagina and Vestibule - Anatomy & Physiology#Histology_and_Innervation|vaginal epithelial cells]] |
− | * Examination of the appearance of the [[Female_Reproductive_Tract_-The_Vagina/Vestibule_-_Anatomy_%26_Physiology|vaginal]] wall. | + | * Examination of the appearance of the [[Vagina and Vestibule - Anatomy & Physiology|vaginal]] wall. |
− | * Measurement of plasma progesterone concentration (detecting a rise in progesterone that preceeds [[The_Ovary_-_Ovulation_-_Anatomy_%26_Physiology|'''ovulation''']] in this species). | + | * Measurement of plasma progesterone concentration (detecting a rise in progesterone that preceeds [[Ovulation - Anatomy & Physiology|'''ovulation''']] in this species). |
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| == Queen == | | == Queen == |
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− | * Oestrus detection is important, for although the queen is an '''induced ovulator''' (thus [[The_Ovary_-_Ovulation_-_Anatomy_%26_Physiology|'''ovulation''']] will not be missed), the LH response to mating decreases with each day of oestrus and [[The_Ovary_-_Follicles_-_Anatomy_%26_Physiology|'''follicles''']] ultimately regress. | + | * Oestrus detection is important, for although the queen is an '''induced ovulator''' (thus [[Ovulation - Anatomy & Physiology|'''ovulation''']] will not be missed), the LH response to mating decreases with each day of oestrus and [[Follicles - Anatomy & Physiology|'''follicles''']] ultimately regress. |
| * '''Proestrus''' is short and often unnoticed. | | * '''Proestrus''' is short and often unnoticed. |
− | * Oestrus is characterized by increased [[Reproductive_Behaviour_-_Attractivity_Behaviour_-_Anatomy_%26_Physiology#Auditory_Signals|vocalization]],rubbing and rolling. | + | * Oestrus is characterized by increased [[Attractivity Behaviour - Anatomy & Physiology#Auditory_Signals|vocalization]],rubbing and rolling. |
| * Queen is more active and will seek the tom. | | * Queen is more active and will seek the tom. |
| * Stands to be mated by lowering her front quarters and extending her hind legs. | | * Stands to be mated by lowering her front quarters and extending her hind legs. |
− | * Demonstrates [[Reproductive_Behaviour_-_Receptivity_Behaviour_-_Anatomy_%26_Physiology|lordosis]] | + | * Demonstrates [[Receptivity Behaviour - Anatomy & Physiology|lordosis]] |
| * Tail erect and held to one side. | | * Tail erect and held to one side. |
| * Slight mucoid vulval discharge. | | * Slight mucoid vulval discharge. |
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| + | {{Learning |
| + | |flashcards = [[Equine Reproduction and Stud Medicine Q&A 15]]<br>[[Equine Reproduction and Stud Medicine Q&A 16]] |
| + | }} |
| + | [[Category:Reproductive Behaviour]] |
| + | [[Category:Bullet Points]] |