EFFICACY OF PRESYNCH- OVSYNCH PROTOCOL ON REPRODUCTIVE PERFORMANCE AND ECONOMIC CONSIDERATION IN DAIRY COWS

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YOUSSEFI R.; VOJGANI M.; GHAREGOZLOO F.; BAHONAR A.R.

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Journal: JOURNAL OF VETERINARY CLINICAL RESEARCH Year:2011 | Volume:2 | Issue:4 (8) Page(s): 203-214

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Title

EFFICACY OF PRESYNCH- OVSYNCH PROTOCOL ON REPRODUCTIVE PERFORMANCE AND ECONOMIC CONSIDERATION IN DAIRY COWS

Author(s)

YOUSSEFI R. | VOJGANI M. | GHAREGOZLOO F. | BAHONAR A.R. | Issue Writer Certificate

Keywords

ESTRUS SYNCHRONIZATIONQ3

REPRODUCTIVE EFFICACYQ2

COST BENEFITQ2

PRESYNCH-OVSYNCHQ2

Abstract

The objective of this experiment was to compare the REPRODUCTIVE EFFICACY and cost-effectiveness of management program involving timedAI after PRESYNCH-OVSYNCH protocol (PO) with insemination at detected estrus. PO protocol is used to increase pregnancy rate and decrease days open and culling for sub-fertility. According to different results of some investigations on the efficacy of this protocol this study was designed to re-evaluate this protocol.In this experiment, 808 dairy cows of a commercial dairy herd in Tehran, randomly allotted to 2 experimental groups: Control group (n: 404) and treatment group (n: 404). Cows in the treatment group synchronized with the PO protocol. In control group artificial insemination has been done after observation of estrus based on AM-PM rule. Statistical analysis showed that Days Open in treatment group was significantly better than control group (P=0.0005). Conception rate did not differ significantly between the PO and control groups (P>0.05). First service conception rates were lower in cows synchronized (31.2% vs.36.4%). At 200 Days in Milk fewer cows in control group were pregnant than cows in PO group (74.5% vs.86.63%) (P<0.05). The results of this study demonstrated that PO program can improve days open and reproductive performance. Days open and culling rate were the major cost factor and PO protocol was economically superior.

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APA: Copy

YOUSSEFI, R., VOJGANI, M., GHAREGOZLOO, F., & BAHONAR, A.R.. (2011). EFFICACY OF PRESYNCH- OVSYNCH PROTOCOL ON REPRODUCTIVE PERFORMANCE AND ECONOMIC CONSIDERATION IN DAIRY COWS. JOURNAL OF VETERINARY CLINICAL RESEARCH, 2(4 (8)), 203-214. SID. https://sid.ir/paper/233021/en

Vancouver: Copy

YOUSSEFI R., VOJGANI M., GHAREGOZLOO F., BAHONAR A.R.. EFFICACY OF PRESYNCH- OVSYNCH PROTOCOL ON REPRODUCTIVE PERFORMANCE AND ECONOMIC CONSIDERATION IN DAIRY COWS. JOURNAL OF VETERINARY CLINICAL RESEARCH[Internet]. 2011;2(4 (8)):203-214. Available from: https://sid.ir/paper/233021/en

IEEE: Copy

R. YOUSSEFI, M. VOJGANI, F. GHAREGOZLOO, and A.R. BAHONAR, “EFFICACY OF PRESYNCH- OVSYNCH PROTOCOL ON REPRODUCTIVE PERFORMANCE AND ECONOMIC CONSIDERATION IN DAIRY COWS,” JOURNAL OF VETERINARY CLINICAL RESEARCH, vol. 2, no. 4 (8), pp. 203–214, 2011, [Online]. Available: https://sid.ir/paper/233021/en

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