Reproductive performance following a modified Presynch-Ovsynch, Double-Ovsynch, or conventional reproductive management program in Korean dairy herds

2020 ◽  
Vol 156 ◽  
pp. 27-35
Author(s):  
Ill-Hwa Kim ◽  
Jae-Kwan Jeong ◽  
Hyun-Gu Kang
Keyword(s):  
Reproductive Performance ◽  
Management Program ◽  
Dairy Herds ◽  
Reproductive Management

scholarly journals Factors That Optimize Reproductive Efficiency in Dairy Herds with an Emphasis on Timed Artificial Insemination Programs

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 301
Author(s):  
Carlos Eduardo Cardoso Consentini ◽  
Milo Charles Wiltbank ◽  
Roberto Sartori
Keyword(s):  
Artificial Insemination ◽  
Body Condition Score ◽  
Management Program ◽  
Pregnancy Rates ◽  
Reproductive Efficiency ◽  
Service Rate ◽  
Dairy Herds ◽  
High Fertility ◽  
Reproductive Management ◽  
Timed Artificial Insemination

Reproductive efficiency is closely tied to the profitability of dairy herds, and therefore successful dairy operations seek to achieve high 21-day pregnancy rates in order to reduce the calving interval and days in milk of the herd. There are various factors that impact reproductive performance, including the specific reproductive management program, body condition score loss and nutritional management, genetics of the cows, and the cow comfort provided by the facilities and management programs. To achieve high 21-day pregnancy rates, the service rate and pregnancy per artificial insemination (P/AI) should be increased. Currently, there are adjustments in timed artificial insemination (TAI) protocols and use of presynchronization programs that can increase P/AI, even to the point that fertility is higher with some TAI programs as compared with AI after standing estrus. Implementation of a systematic reproductive management program that utilizes efficient TAI programs with optimized management strategies can produce high reproductive indexes combined with healthy cows having high milk production termed “the high fertility cycle”. The scientific results that underlie these concepts are presented in this manuscript along with how these ideas can be practically implemented to improve reproductive efficiency on commercial dairy operations.

scholarly journals A stochastic model for the simulation of management decisions in dairy herds, with special reference to reproductive performance.

1985 ◽  
Vol 33 (1) ◽  
pp. 59-61
Author(s):  
A.A. Dijkhuizen ◽  
S. Hibma ◽  
J.A. Renkema
Keyword(s):  
Adverse Effects ◽  
Dairy Cattle ◽  
Stochastic Model ◽  
Special Reference ◽  
Reproductive Performance ◽  
Dairy Herds ◽  
Calving Interval ◽  
Management Decisions

A 15 year simulation was carried out in order to test a model for dairy cattle culling. Provisional results indicate that decreasing max. allowed calving interval from 520 to 360 days decreases herd income due to adverse effects on herd life. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Reproductive management practices among Tulare, California, dairy herds. I. Census and descriptive aspects

1989 ◽  
Vol 7 (2) ◽  
pp. 83-100 ◽  
Author(s):  
P. Cowen ◽  
C.W. Schwabe ◽  
H.R. Rosenberg ◽  
R.H. Bondurant ◽  
C.E. Franti ◽  
...  
Keyword(s):  
Management Practices ◽  
Dairy Herds ◽  
Reproductive Management
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