THE EFFECT OF TWO DIFFERENT PERIODS OF CIDR SUPPLEMENTATION ON THE SECOND SERVICE CONCEPTION RATE OF REPEAR BREEDER DAIRY COWS

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GHASEMZADEH NAVA H.; KOHSARI H.; TAJIK P.

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Journal: Journal of Veterinary Research Year:2010 | Volume:65 | Issue:2 Page(s): 147-151

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Title

THE EFFECT OF TWO DIFFERENT PERIODS OF CIDR SUPPLEMENTATION ON THE SECOND SERVICE CONCEPTION RATE OF REPEAR BREEDER DAIRY COWS

Author(s)

GHASEMZADEH NAVA H. | KOHSARI H. | TAJIK P. | Issue Writer Certificate

Keywords

COWQ3

REPEAT BREEDERQ2

PROGESTERONEQ3

CONCEPTION RATEQ2

Abstract

Repeat breeding (RB) is a syndrome and several factors have been identified as its causes. Luteal insufficiency is a known cause of embryonic mortality. The aim of this study was to assess the effect of two periods of P4 therapy on the Second service and also their effects on the First plus the second service CONCEPTION RATEs (CR) of REPEAT BREEDER dairy COWs. COWs included in the study were in their first to fifth lactation and had 3 to 6 unsuccessful inseminations within the current lactation. They were inseminated according to the AM/PM rule relative to estrus onset, and randomly assigned into 3 groups: (A) CIDR on day 5 after insemination that was removed on day 9 of the cycle (n=40); (B) CIDR on day 5 after insemination that was removed on day 19 of the cycle (n=36); and (C) untreated controls (n=40). Pregnancy diagnosis was conducted by rectal palpation about 45 days after AI in COWs no observed in estrus. The second service CR and overall CR in groups A, B and C were 61.7, 42.9, 21.4 and 82.5, 66.7, 45 percent, respectively. Group A showed higher level compared to the controls (p<0.05). In conclusion, REPEAT BREEDER COWs in groups A and B benefited from PROGESTERONE supplementation, but significant effects of treatment for improvement of CONCEPTION RATE was seen in shortterm treatment (4 days treatment).

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APA: Copy

GHASEMZADEH NAVA, H., KOHSARI, H., & TAJIK, P.. (2010). THE EFFECT OF TWO DIFFERENT PERIODS OF CIDR SUPPLEMENTATION ON THE SECOND SERVICE CONCEPTION RATE OF REPEAR BREEDER DAIRY COWS. JOURNAL OF VETERINARY RESEARCH, 65(2), 147-151. SID. https://sid.ir/paper/35629/en

Vancouver: Copy

GHASEMZADEH NAVA H., KOHSARI H., TAJIK P.. THE EFFECT OF TWO DIFFERENT PERIODS OF CIDR SUPPLEMENTATION ON THE SECOND SERVICE CONCEPTION RATE OF REPEAR BREEDER DAIRY COWS. JOURNAL OF VETERINARY RESEARCH[Internet]. 2010;65(2):147-151. Available from: https://sid.ir/paper/35629/en

IEEE: Copy

H. GHASEMZADEH NAVA, H. KOHSARI, and P. TAJIK, “THE EFFECT OF TWO DIFFERENT PERIODS OF CIDR SUPPLEMENTATION ON THE SECOND SERVICE CONCEPTION RATE OF REPEAR BREEDER DAIRY COWS,” JOURNAL OF VETERINARY RESEARCH, vol. 65, no. 2, pp. 147–151, 2010, [Online]. Available: https://sid.ir/paper/35629/en

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