Document Detail

Equine fetal sex determination using a single ultrasonic examination under farm conditions.
MedLine Citation:
PMID:  12240926     Owner:  NLM     Status:  MEDLINE    
The aims of this study were to evaluate the reliability, under general farm conditions, of the use of a single transrectal sonogram in pregnant mares to determine fetal sex by locating the genital tubercle, and the feasibility of extending the period of gestation in which this examination can be carried out. This research was done during routine reproductive examinations on three different stud farms. Forty mares between the 54th and the 89th day of gestation were examined once; gestation was calculated by identifying the last day of mating as Day 0. In order to verify the precision of the determination, data regarding the sex of the foals at birth were collected. This information was not available for two of the 40 mares examined. The diagnosis was made without any certainty level or any other methods which might quantify or increase the reliability of the examination. Of 40 mares, a diagnosis was possible in 35 (87%); in five mares (12%), it was not possible due to insufficient data. Twenty-six of 40 sex determinations (65%) were correct, 9 of 40 (22%) were incorrect. The comparison of the percentages obtained using the chi2-test was P = 0.0011. In spite of positive statistical analysis, the results of this study are not sufficient to allow systematic use of this approach due to the high percentage of error.
Gaetano Mar; Carolina Castagnetti; Stefano Belluzzi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Theriogenology     Volume:  58     ISSN:  0093-691X     ISO Abbreviation:  Theriogenology     Publication Date:  2002 Oct 
Date Detail:
Created Date:  2002-09-20     Completed Date:  2002-11-15     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0421510     Medline TA:  Theriogenology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1237-43     Citation Subset:  IM    
Dipartimento Clinico Veterinario, Università degli Studi di Bologna, Italy.
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MeSH Terms
Gestational Age
Horses / embryology*
Sex Determination (Analysis) / methods,  veterinary*
Ultrasonography, Prenatal / veterinary*

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