New Tools for Estrous Synchronization

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New Tools for Estrous Synchronization Costs and
Benefits

• Doug Zalesky, Ph.D and Ryon Walker
• San Juan Basin Research Center
• Colorado State University
• 2003 Range Beef Cow Symposium
• Mitchell, NE

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CIDR PG Protocol
Lutalyse
CIDR
Day 0 Day 6 Day 7
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CSU CIDR Studies
Heifer Study 375 crossbred heifers 3 herds San
Juan Basin Research Center - Colorado Beef
Improvement Center - Wyoming Quinn Cattle Co.
South Dakota
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CSU CIDR Studies
Heifer Study Modified Co-Synch CIDR CIDR
Insert CIDR Removal 54 h Timed GnRH
PG AI Trt 1 No
GnRH Trt 2 GnRH Day 0 Day
7 Day 9
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CSU CIDR Studies
Heifer Results Location Number Trt 1 Trt
2 Overall PR, PR, PR, S. Dakota
211 40.4 54.2 47.4 SJBRC
39 52.6 55.0 53.9 BIC
125 54.0 56.5 55.2 Pooled
375 46.2 55.0 50.6
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CSU CIDR Studies
Cow Study 583 head (Angus and Red Angus
crossbreds) 2 herds San Juan Basin Research
Center Colorado Beef Improvement Center -
Wyoming
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CSU CIDR Studies
CIDR Insert CIDR RemovalPG 54 h
Timed AI GnRh Trt 1 No Calf
Removal on remaining Trt 2 Calf Removal
cows
Heat Detect Breed
Day 0 Day 7 Day 8 Day 9
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CSU CIDR Studies
Cow Study SJBRC BIC
Pooled Heats n Preg n Preg n
Preg Trt 1 16 62.5 29 62.1
45 62.2 Trt 2 27 77.8 52 67.3
79 70.9
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CSU CIDR Studies
Cow Study SJBRC BIC
Pooled TAI n Preg n Preg n
Preg Trt 1 85 40.0 160 42.5
245 41.6 Trt 2 77 28.6 137
36.5 214 33.6
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CSU CIDR Studies
Cow Study SJBRC BIC
Pooled Total n Preg n Preg n
Preg Trt 1 101 43.6
189 45.5 290 44.8 Trt 2 104
41.3 189 45.0
293 43.7 Overall 205 42.4
378 45.2 583 44.3
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Synchronization System Costs PG 1.57 GnRH
2.50 MGA 0.02/hd/d CIDR
8.00 Protocol Cost Type CR PR 2 X
PG 3.14 Cows 60.6 S. Synch 4.07 Cows 65.7
Co-Synch 6.57 Cows 49.0 Ovsynch 6.57 Cows
57.0 MGAPG 1.85 Cows 63.0 MGA
Sel. 4.35 Cows 66.0 7-11 Synch 5.78 Cows 47.
0
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Synchronization System Costs PG 1.57 GnRH
2.50 MGA 0.02/hd/d CIDR
8.00 Protocol Cost Type CR PR CIDR
PG 9.57 Cows 61.0 CSU Study
12.07 Cows 44.3
14.57 Heifers 50.6
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Benefits of CIDR

• No heats during treatment no early estrus
• High concentration of heats within a short time
  period (24-48 h post CIDR removal)
• allows for use of TAI
• reduces amount of time for heat detection
• 3. Ease of use both insertion and removal

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Appreciation
Pharmacia Upjohn CIDRs and
Lutalyse Intervet, Inc. Fertagyl Select Sires
semen Quinn Cattle Co. - Chadron, NE Beef
Improvement Center Saratoga, WY San Juan Basin
Research Center Staff
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