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OJVRTM

 

Online Journal of Veterinary Research©

(Including Medical and Laboratory Research)

Established 1994

ISSN 1328-925X

 

Volume 29 (2): 85-93, 2025.

Effects of abortion on performance and culling in dairy herds.

 

S Taraphder, SS Tomar,  AK Gupta.

 

Animal Genetics and Breeding Department, West Bengal University of Animal and Fishery Sciences, Belgachia, Kolkata, Dairy Cattle Breeding Division, NDRI, Karnal, India

 

ABSTRACT

 

Taraphder S, Tomar V,  Gupta AK., Effects of abortion on performance and culling in dairy herds, Onl J Vet Res., 29 (2): 85-93, 2025. We found ~10% abortion in 1279 pregnant cows peaking (P < 0.05) during 2nd trimester of gestation. Mean culling following abortion was ~48% and interval to conception 124 days. The incidence was greater (p < 0.05) during the second trimester (5.2%) than during the first trimester (1.5%). The mean culling rate following abortion was 47.6% but time of abortion did not affect culling.  In our study aborted cows were 3.1 times of higher risk of being culled. The overall mean intervals from abortion to conception were 124.3 ± 14.75 days.  During 1st trimester 19 aborted with 1.5% pregnant, during 2nd trimester 67 aborted with 5.3% pregnant and 3rd trimester, 44 aborted with 3.6% pregnant whereas by culling only 13 aborted (68%).  Mean interval from abortion to conception was longer (p < 0.05) for cows with abortion during 3rd trimester than those aborting during 1st and 2nd trimesters. Mean intervals from abortion to conception were longer (p < 0.05) for cows with 3 or more abortions. Findings suggest abortion was associated with longer calving intervals.

 

Keywords: Cow, Abortion, Culling, Conception, reproductive performance