PREVALENCE AND RISK FACTORS OF REPEAT BREEDER SYNDROME IN ISFAHANHOLSTEIN COWS

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GOLESTANI NAVID; MOGHISEH ASGHAR; KAFI FLAVARJANI MOJTABA; DADPASAND MOHAMMAD

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Journal: Journal of Animal Production Year:2018 | Volume:20 | Issue:3 Page(s): 389-398

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Title

PREVALENCE AND RISK FACTORS OF REPEAT BREEDER SYNDROME IN ISFAHANHOLSTEIN COWS

Author(s)

GOLESTANI NAVID | MOGHISEH ASGHAR | KAFI FLAVARJANI MOJTABA | DADPASAND MOHAMMAD | Issue Writer Certificate

Keywords

DAIRY COWSQ1

ODDS RATIOQ1

REPEAT BREEDER SYNDROMEQ2

RISK FACTORSQ2

Abstract

The aim of this study was to determine the incidence and quantify RISK FACTORS associated with repeat breeder (RB)syndrome in Isfahan Holstein DAIRY COWS. Calving and insemination data of parities 1 to 7 on 91727 Holstein dairycows from 62 herds collected during 1993 to 2013 were used. Cows failed to conceive after three or more regularlyspaced services in the absence of detectable abnormalities regarded as RB. A multivariate logistic regression modelwas used to quantify risk factor associated with repeat breeding. Least squares mean number of services perconception were 2. 15 ± 0. 15 and 2. 54 ± 0. 15 for normal and RB cows, and uncorrected values were 2. 73 and 3. 28 fornormal and RB cows, respectively. Herd, milk yield, season of calving and season of first insemination, dystocia, stillbirth, abortion and days from calving to first service were the major factors affecting RB syndrome. Averageincidence of repeat breeding was 43. 7% (27. 8-55. 2%). Dystocia and stillbirth increased the odds of being RB by 39%and 11%, respectively (P < 0. 01). Risk of being RB in high producing cows increased by 79% compared to cows withlow milk yield (P < 0. 01). Odds of being RB increased by 28% in cows that was RB in previous parity. Fat yield andlength of dry period had no significant effect on being RB. Considering at least 75 days distance between calving andfirst service, insemination in cool seasons, decreasing dystocia and improving reproduction management of highproducing cows, could reduce RB syndrome.

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APA: Copy

GOLESTANI, NAVID, MOGHISEH, ASGHAR, KAFI FLAVARJANI, MOJTABA, & DADPASAND, MOHAMMAD. (2018). PREVALENCE AND RISK FACTORS OF REPEAT BREEDER SYNDROME IN ISFAHANHOLSTEIN COWS. JOURNAL OF ANIMAL PRODUCTION (JOURNAL OF AGRICULTURE), 20(3 ), 389-398. SID. https://sid.ir/paper/209101/en

Vancouver: Copy

GOLESTANI NAVID, MOGHISEH ASGHAR, KAFI FLAVARJANI MOJTABA, DADPASAND MOHAMMAD. PREVALENCE AND RISK FACTORS OF REPEAT BREEDER SYNDROME IN ISFAHANHOLSTEIN COWS. JOURNAL OF ANIMAL PRODUCTION (JOURNAL OF AGRICULTURE)[Internet]. 2018;20(3 ):389-398. Available from: https://sid.ir/paper/209101/en

IEEE: Copy

NAVID GOLESTANI, ASGHAR MOGHISEH, MOJTABA KAFI FLAVARJANI, and MOHAMMAD DADPASAND, “PREVALENCE AND RISK FACTORS OF REPEAT BREEDER SYNDROME IN ISFAHANHOLSTEIN COWS,” JOURNAL OF ANIMAL PRODUCTION (JOURNAL OF AGRICULTURE), vol. 20, no. 3 , pp. 389–398, 2018, [Online]. Available: https://sid.ir/paper/209101/en

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