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OJVRTM
Online Journal of Veterinary Research©
Volume
19(12): 776-784, 2015.
Risk factors
associated with repeat breeder syndrome in Holstein cows.
1Dadpasand, M. 2Golestani,
N., 2Moghiseh, A., 2*Kafi, M., 3Rowshan,
H.
1Animal Sciences,
College of Agriculture, 2Clinical Sciences, School of Veterinary
Medicine, Shiraz University, 3Clinical Sciences, Veterinary faculty,
Islamic Azad University, Kazeroon, Iran
ABSTRACT
Dadpasand M, Golestani N, Moghiseh A, Kafi M, Rowshan H., Risk factors associated with repeat breeder
syndrome in Holstein cows, Onl J Vet Res., Volume 19(12): 776-784, 2015. Calving,
insemination and parturition data was used to determine links with repeat
breeding syndrome in 11,249 Holstein dairy cows. Repeat breeders (42%) were
defined as those requiring 3 or more inseminations to conceive. Multivariate
logistic regression was used to determine risk factors associated with repeat
breeding. Mean number of services per conception ranged 1.95 to 3.25 in normal
cows and 1.54 to 3.95 in repeat breeders. Herd, milk yield, season of calving,
time of 1st insemination, dystocia, stillbirth, abortion and days from calving
to 1st service were associated risk factors. Average repeat breeding
was greater in cows that had had dystocia, stillbirth, higher milk production
and previous repeat breeders. In contrast, retention of
placenta, sex of calf or length of dry period was not associated significantly
with the syndrome..
Keywords: Repeat breeding syndrome, Holstein cows, Iran.
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