Hair whorl patterns on the bovine forehead may be related to breeding soundness measures

The objective of this study was to determine if there is an association between facial hair whorl patterns on the bovine forehead and sperm morphology. Breeding soundness exams were conducted on 219 yearling bulls at three Colorado State University facilities. There were 150 Angus bulls and the rema...

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Bibliographic Details
Published in:Theriogenology 2004-08, Vol.62 (3-4), p.450-457
Main Authors: Meola, Melissa G, Grandin, Temple, Burns, Patrick, Deesing, Mark
Format: Article
Language:English
Subjects:
Angus
Animals
beef bulls
body measurements
breed differences
Breeding - methods
Breeding soundness
Bulls
Cattle
culling (animals)
early selection
Face
fetal development
Hair - anatomy & histology
Hair - growth & development
Hair whorls
hairs
Male
male fertility
scrotum
Scrotum - anatomy & histology
sire evaluation
Sperm morphology
sperm motility
spermatozoa
Spermatozoa - abnormalities
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Summary:The objective of this study was to determine if there is an association between facial hair whorl patterns on the bovine forehead and sperm morphology. Breeding soundness exams were conducted on 219 yearling bulls at three Colorado State University facilities. There were 150 Angus bulls and the remaining bulls were of several different breeds. Hair whorl patterns on the forehead were classified as round or nonround epicenters. Angus bulls with round epicenters had a higher percentage of morphologically normal spermatozoa compared to nonround epicenters (P
ISSN:0093-691X
1879-3231
DOI:10.1016/j.theriogenology.2003.10.021