Ultrasound Confirmation of Ovulation in Mares: A Normal Corpus Luteum or a Haemorrhagic Anovulatory Follicle?

The most common pathological anovulatory condition that occurs spontaneously during the breeding season in the mare is the haemorrhagic anovulatory follicle (HAF). A relatively high proportion of mares, soon after ovulation, develop a corpus haemorrhagicum (CH) with a central lacuna. This type of co...

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Bibliographic Details
Published in:Reproduction in domestic animals 2013-02, Vol.48 (1), p.105-111
Main Authors: Cuervo‐Arango, J, Newcombe, JR
Format: Article
Language:English
Subjects:
Animal reproduction
Animals
Anovulation - diagnosis
Anovulation - pathology
Anovulation - veterinary
breeding season
corpus luteum
Corpus Luteum - diagnostic imaging
Female
Females
Hemorrhage - diagnosis
Hemorrhage - diagnostic imaging
Hemorrhage - pathology
Hemorrhage - veterinary
Horse Diseases - diagnosis
Horse Diseases - diagnostic imaging
Horse Diseases - pathology
Horses
mares
ovulation
Ovulation - physiology
Reproductive system
Ultrasonic imaging
ultrasonics
Ultrasonography
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Summary:The most common pathological anovulatory condition that occurs spontaneously during the breeding season in the mare is the haemorrhagic anovulatory follicle (HAF). A relatively high proportion of mares, soon after ovulation, develop a corpus haemorrhagicum (CH) with a central lacuna. This type of corpora lutea may resemble an HAF, which may complicate the accurate diagnosis of ovulation. The main objective of this study was to compare the ultrasound data of mares examined frequently with HAFs and CHs to elucidate whether it is possible to distinguish them from each other. A total of 135 ovulating mares were classified according to the morphology of the corpus luteum (CL) in mares with: a solid CL, a CH with small or with large central cavities. Ultrasound characteristics of the development of 11 HAF and 13 CHs with a large central cavity were compared. The pre‐ovulatory follicular diameter of ovulatory mares was significantly correlated with the diameter of CH with large central cavities. The percentage of mares with post‐ovulatory areas eligible to be mistaken with a CH was
ISSN:0936-6768
1439-0531
DOI:10.1111/j.1439-0531.2012.02039.x