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Artificial Insemination (AI) in the US Dairy Herd
NAHMS, 2009
Artificial Insemination; Is it Worth My Time? December 7 th , 2010 - - PowerPoint PPT Presentation
Artificial Insemination; Is it Worth My Time? December 7 th , 2010 - - PowerPoint PPT Presentation
Artificial Insemination; Is it Worth My Time? December 7 th , 2010 Carl R. Dahlen Artificial Insemination (AI) in the US Dairy Herd NAHMS, 2009 Potential Benefits of AI: Increase Uniformity of Calf Crop Increase Weaning Weight Enhance
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Potential Benefits of AI:
Increase Uniformity of Calf Crop Increase Weaning Weight Enhance Carcass Value Improve Genetics of Herd
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Potential Benefits of AI:
Reduce Risk of Disease Reduce Birth Weight Shorten Calving Season Produce Calves of Known Sex?
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35.0 1.6 19.5 14.3 3.9 2.2 18.0 7.6 7.9 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 Any Technology Embryo Transfer Semen Evaluation Body Condition Scoring Pelvic Measurement Ultrasound Palpation for Pregnancy Artificial Insemination Estrus Synchronization Percent of operations
NAHMS, 2010
Reproductive Technology Use in US Beef Herd
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Potential Drawbacks of AI:
Time and Labor T
- o Complicated
Cost Facilities Do Not Work “Other” T
- p 2 concerns = 55% of Operations
NAHMS, 2010
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Estrous Synchronization Protocols
T wo shot PGF 7-11 Synch Select Synch Ov-synch CO-synch MGA/PGF MGA Select CIDR/PGF Select Synch+CIDR & TAI Heat Synch Hybrid Synch Hybrid Synch+CIDR One shot PGF Presynch Resynch 7-d CO-synch + CIDR 5-d CO-synch + CIDR MGA-PG & TAI 14 d CIDR-PG & TAI PG-7-d CO-synch +CIDR CO-Synch + hCG Resynch
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What Makes a Good Protocol?
It HAS to work!!!
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CO-Synch + CIDR protocol
(Lamb et al., 2006; Larson et al., 2006)
Day -7 0 54-66 h
GnRH & TAI GnRH PGF CIDR
What do we expect: ~56% pregnant (range of 43-74%) How many cows does your bull cover in the first cycle? ~50% pregnant (Similar Range)
What Works?
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What Does AI Cost?
GnRH = CIDR = PGF = Semen = Labor = T
- tal
$4.40 $2.00 $9.00
$15.00
$4.10
$34.50
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What Does AI Cost?
Still need to have cleanup bulls 50% pregnancy rate to AI = 50% the bulls don’t have to cover = 50% Fewer Bulls
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Determining Bull Cost in a Natural Service Herd
Purchase Price Feed Yardage Health Interest Stocking Rate Useful Life Depreciation Death Loss Salvage Value
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$365 $506 $6,506 $6,000 $91 $50
Example of Cost
Purchase Price Feed Yardage Health First Year Recurring Cost
$83.45
25 $2,086 $6,259 $1,260 $7,519 3
Useful Life Cost over Life Salvage Value Adj T
- tal Cost
Adj Yearly Cost Stocking Rate Cost Per Cow
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Evaluation of Systems
Day -7 0 54-66 h
GnRH & TAI GnRH PGF CIDR
Day 0
Turn in Bull
Treatment (TAI): Control:
n = 582 n = 615
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10 20 30 40 50 60 70 80 90 100 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Percentage of cows calving
Day of calving season
TAI Control
Cumulative Calving Distribution
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18 22 20 15 7 7 3 3 1 4 6 16 25 21 10 9 4 2 1 7
5 10 15 20 25 30
1-10 11-20 21-30 31-40 41-50 51-60 61-70 71-80 80+ NC
% Days
P<.01
* * * ** **
Noncumulative Calving Distribution
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Item TAI Control Weaning weight, lbs 514 508 Cows weaning a calf, % 84x 78y Weaning weight per cow exposed, lbs 426x 388y
Weaning Results
x,yMeans Differ (P < 0.01)
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Items of Interest
Calving Distribution/Ease Weaning Weight Physical Characteristics Frame, Muscling, Conformation Performance beyond weaning Backgrounding, finishing, metabolism Longevity in cow herd Genetic progress over time
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