Estrus Synchronization (2)

8/4/2019 Estrus Synchronization (2)

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Estrus

Synchronization Planning for

Success

Dr. Daryl Strohbehn

Extension Beef Specialist


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There are no secrets

to success. It is theresult of preparation,hard work andlearning from failure.

--General Colin Powell

The road to success isalways underconstruction.

--Unknown

The Secret to Success?


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Keep in mind thatneither success nor

failure is ever final.--Roger W Babsonstatistician,

columnist

As soon as you think youhave reached success


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Battlecry: Fit the Grids


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Increased Spread in Cattle Value

5 10Years

Ago

Today

+/- $5from

Average

+/- $15

fromAverage

Feeder CattleFeeder CattleValueValue 5 10Years

Ago

Today

+/- $1from

Average

+/- $10

fromAverage

Fed Cattle ValueFed Cattle Value


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So, The Heat is On!

q Having the correctgenetics is becominghighly important inmeeting industrydemands.

q And correct genetics isimperative to achieving

premium dollars andenhancing returns oninvestment.


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Using our Understanding of the Estrous Cyclehttp://www.iowabeefcenter.org/content/genetics.htm#EstrusS


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So what do you have to get your hands

around in synchronizing AI?

q CAREFUL Planning & execution of the planq Is your herd suited to a synch system?

q Record system

q

Labor needs and trade-offsq Number of times through the chute

q Budgeting for the system costs

q Handling facility capabilities

q Impact on calving distribution?

q Expectations of the synch system


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Synchronization Expectations

q Quick Web Search of Recent Results

Using Todays Mainstay Synch Programs

10 Trials with 2,970 females in 34 different

experimental groups

Average Synch Preg. Rate = 50.5% (8 to 66%)

26% of groups >60% preg. rate

50% of groups 40-60% preg. Rate

24% of groups < 40% preg. Rate


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Synchronization Expectations

q Quick Web Search of Recent Results

Using Todays Mainstay Synch Programs

10 Trials with 2,970 females in 34 different

experimental groups

Average Synch Preg. Rate = 50.5% (8 to 66%)

26% of groups >60% preg. rate

50% of groups 40-60% preg. Rate

24% of groups < 40% preg. Rate

Moral of Story

Dont expect miracles;

do expect variation


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Conception Rate Formula

(Cow Fertility) x (Heat Detection) x (Semen Fertility) x

(AI Technique)

Mess up one ofthese and kiss

successful AIgoodbye!


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Estrus Synch is an Investment

qLabor

qFacilities

qManagementSkill

qDollars

In round numbersq

Synch programs canrange in budgeted

costs from $20 - $50

per female

synchronized


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Breeding Female Evaluation for

Synchronization Systems


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Criteria for Evaluating Candidates

for Synchronizationq Fertility rate

q Calving

distributionq Cow age

q Body conditionscore

q Calving success


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Calving Distribution

Impact of Days After Calving on % Cycling

01 02 03 04 05 06 07 0

< 3 0 3 1 -4 0 4 1 -5 0 5 1 -6 0 6 1 -7 0 7 1 -8 0 8 1 -9 0 > 9 0D a y s A f t e r C a l v i n g

F ig . 1 : I m p a ct o f D a y s A ft e r C a l v in g o n % C y c li n g

%

Cycling

Days after calving


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Impact of Cow Age on % Cycling Before

SynchronizationJohnson and Stevenson, KSU

010203040506070

1st Calvers 2nd Calvers & Older

F i g 2 : Imp a c t o f C o w A g e o n % Cy c l i n g B e f or eSynch r on i z a t i o n

5 5 %64 %

%

Cycling

Heifers take 20 days longer to cycle.


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Body Condition Score

CS = 4

CS = 6


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Body Condition Score

CS = 4

CS = 6

Barometer of your nutrit ionprogram.Major influence on start of cycl icity.


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Effect of BCS at breeding on % Cycling

CS


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Can We Jump Start Non-Cycling or

Anestrous Females?

Yes..

But dont think

you can be the

miracle worker!


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Impact of a Progestin on Estrous Response

and Synch Preg. Rates

Patterson, et.al.: 2004 NE Applied Repro Conference

2 shot PG

MGA-PG 17d.

MGA-2 shot PG

MGA-PG 19d.

MGA Select

7-11 Synch

241/422 = 57%

305/408 = 75%

327/348 = 93%

161/206 = 78%

275/313 = 88%

142/155 = 93%

147/422 = 35%

220/408 = 54%

243/348 = 70%

130/206 = 63%

195/313 = 62%

101/155 = 65%

Heat detect system Estrous response Synch preg. rate

85% 62%


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Impact of a GnRH on Jump StartingJohnson and Stevenson, 2004

010203040

50


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010203040

50


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0102030405060


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0102030405060


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Summary

q For maximum successrates: Current herd fertility

>90% 60-90 days

breeding season Best female candidates

calve in 1st 42 days ofcalving season, thus atleast 40 days before

start of breeding season.


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Summary continued

q For maximum successrates:

1st calf heifers need

additional recovery timefollowing calving andstrong body condition isimperative.

On the cow side,minimum BodyCondition Score of 4.5

X


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$$$Remember: This is an investment for added

genetic improvement; manage it wisely formaximum returns.


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Labor Needs & Trade Offs

qLabor centers around feeding routines,

cattle roundup, handling through chute,

vet type practices, heat detection and AIroutines.

qMore than one producer has indicated

they experienced a shortage of labor atkey times in estrus synchronization.


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Labor Needs & Trade Offs

qLabor centers around feeding routines,

cattle roundup, handling through chute,

vet type practices, heat detection and AIroutines.

qMore than one producer has indicated

they experienced a shortage of labor atkey times in estrus synchronization.

Take home message

Many AI programs compete with otherfarming routinesthink through whereis the labor supply coming from and will itbe available at peak work times.


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Number of

chute trips

vary with

SynchPrograms

Synchronization System

Number of

Chute Times

1 = 1 Injection Prostaglandin (prior estrus detection) 2

2 = 1 Injection Prostaglandin (no prior estrus detection) 2

3 = 2 Injection Prostaglandin (no prior estrus detection) 3

6 = MGA + Prostaglandin System (19 day between) 2

7 = Select Synch 3

8 = MGA Select 3

9 = MGA Select with E-AI and Cleanup AI 3

10 = CO-Synch System with Fixed-Time AI 3

12 = 7-11 Synch 4

13 = OvSynch 4

14 = Select Synch + CIDR 3

15 = CIDR -7th Day Prostaglandin 3

16 = Select Synch + CIDR with E-AI and Cleanup AI 3

17 = MGA Select with Fixed-Time AI 3

18 = 7-11 Synch with Fixed-Time AI 419 = Select Synch with E-AI and Cleanup AI 3

20 = 7-11 Synch with E-AI and Cleanup AI 4

22 = CO-Synch + CIDR with Fixed-Time AI - 66 3

23 = CO-Synch + CIDR with Fixed-Time AI -54 3

25 = CIDR -7th Day Prostaglandin E-AI and Cleanup AI 3

26= MGA + PG System (19 day) -E-AI and Cleanup AI 2.3

27=MGA + PG System (19 day) -Fixed-Time AI 2

From IBCEstrusSynch

Planner2004


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Cattle Handling Facility

qVery good to excellent handling

facility is a necessity for a

synchronized AI program.qThink safety! Human and cattle.

qThink cattle flow and efficiency.

qThink location.


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Cattle Handling Facility

qComplications

Location of facility Many times it is near wintering/calving

facilities and no where near breedingpastures.

Think through cattle management flowprior to synch program.

May mean short drylot periods orchanging pasture rotations.


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Question.If I breed them all on the

same day wont I compound

my calving season problemsnext year?


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Question.If I breed them all on the

same day wont I compound

my calving season problemsnext year?

The data does notsupport that. Theydont all calve on thesame day.


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Sire A: 21daygestation

length range

Sire B: 21daygestation

length range

Calving Distribution of Cows Conceiving toFixed-Time AI Program, Bader at U. Missouri,JAS, 2005

Location 1


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Sire C: 16daygestationlengthrange

Sire D: 20daygestation

length range

Location 2


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Sire E: 18daygestationlength range

Location 3


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Synchronized AI

PGF

CIDR

MGA

GnRHLarge number ofsystems

All with different timesequences


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Estrous Synchronization Systems AboundEach has its own unique timingTwo shot PGF-11 Synch

Select Synch

Ov-synch

CO-synch

MGA/PGF

MGA Select

CIDR/PGF

CO-synch+CIDR

Heat Synch

Hybrid SynchHybrid Synch+CIDR

One shot PGFPresynch

Resynch


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Synch Systemsq

A huge number existtoday.q Each has a unique twist.q Not all systems fit all

operations.q Scheduling errors are

committed in timing offeed supplements and/orinjections.

q

Comparison of cost/benefitratio.


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Common causes of failure or poor results

with synchronization

q Wrong system for the

situation

More anestrous females

than expected

Cow system applied to

heifers

q Treatment protocol not

followed

Wrong hormone or wrongintervals

q Unrealistic expectations


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Current Recommended

DecisionsDecisionsDecisions

Decisions


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Bee f Rep rodu c t ion Task Fo r ceLeading expertsUniversity research andextension special istsAI industryAnimal Health industryIndustry research personnel


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Main Questions to Ask Age of females yearl ings vs.cows? Will ingness to detect heat? How much labor can you invest? What is your budget? Will ingness/abil ity to getconsistent feed intakes?


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11 Recommended ProgramsWhy?These are the synchronization systemswhich through research and commercial usehave proven to be the most successfully

applied on an industry-wide basis.Based on various herd needs, these systemsmeet the variation in the criteria areas ofcost, labor input, heat detect or fixed-time

AI and acceptable pregnancy results.


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RecommendedSynch Protocolsfor Cows and

Heifers.


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Comparison of Protocols for Beef CowsComparison of Protocols for Beef Cows

Heat Detection Cost LaborSelect Synch Low Medium/HighSelect Synch + CIDR High Medium

Heat Detect & TAISelect Synch Low Medium/High

(TAI non-resp. 72-84 hrs after PG)

Select Synch + CIDR High Medium


Fixed-Time AI (TAI)CO-Synch + CIDR High Medium(TAI 60 +/- 2 hrs after PG w/ GnRH at TAI)


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Comparison of Protocols for Beef HeifersComparison of Protocols for Beef Heifers

H e a t D e t e c t io n C o s t L a b o r1 Shot PG Low HighCIDR-PG Medium MediumMGA-PG Low Low/MediumH e a t De t e c t & T A ISelect Synch + CIDR Low Medium


MGA-PG High Medium(TAI non-resp. 72-84 hrs after PG)F ix e d - T i m e A I ( TA I )

CO-Synch + CIDR High Medium

(TAI 54 +/- 2 hrs after PG w/ GnRH at TAI)

MGA-PG Medium Medium


CIDR Select High Medium/High



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Are there other systems? Yes. Some of the others may fi t yourlabor or faci l it ies better, but onaverage they may not give thelevel of synchronized pregnancyas do the recommended systems.


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Features17 Synch Systems

Heat detect & AI systems

Heat detect & cleanup AI systemsFixed-Timed AI Systems


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Synch06A cooperative programming effort

between the Iowa Beef Center and the

North Central Region Bovine

Reproductive Task Force


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Authors and Programmers:

Dr. Daryl Strohbehn, Iowa State University

Dr. Garland Dahlke, Iowa State University

Mark Dikeman, Formerly with Iowa Beef Center

Co-Authors:

Dr. Rick Funston, University of Nebraska

Dr. Sandy Johnson, Kansas State University

Dr. Darrel Kesler, University of Illinois

Dr. Cliff Lamb, University of Minnesota

Dr. David Patterson, University of Missouri

Dr. George Perry, South Dakota State University

A MicrosoftExcelspreadsheetapplication


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Goal of Synch06Goal of Synch06To promote the correct applicationo promote the correct applicationof research validatedf research validatedsynchronization systems.ynchronization systems.


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Featuresq 17 Synch Systems

Heat detect & AI systems

Heat detect & cleanup AI systemsFixed-Timed AI Systems


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Featuresq Recommendation of various synch

systems for cows & heifers

q List of daily activities

q Barn Calendar of Synch System


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FeaturesqBudgeted cost analysis of

Synch Systems

qSupport materials


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What does it do?q Assists with the challenge of planning and

implementing some of the complicated synchsystems.

q Eliminates timing errors Injections

Start and end dates of MGA feeding

CIDR insertions, etc.


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What does it do?

qHelps to optimize labor use.qAllows one to analyze and

compare input costs of severalsynchronization systems.


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Only 5 inputs are neededfor the program to dothe Synch Calendar.

Notice there are recommendedand less preferred Synchsystems for Cows and Heifers.

10/22/2004 9:27

Producer Name: Best Cowman

Address: 123 Farm Lane

Town: Anywhere USAEstrus Synchronization Planner


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Town: Anywhere, USA

Phone Number: 999/123-4567

6/1/2005 Prepared by: Iowa Beef Center3/9/2006 Phone Number: 515/294-BEEF

Sunday Monday Tuesday Wednesday Thursday Friday Saturday

4/24 /2005 4 /25/2005 4/ 26 /2005 4/ 27 /2005 4/28/ 2005 4/29 /2005 4 /30/ 2005* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

5/1/2005 5/2/2005 5/3/2005 5/4/2005 5/5/2005 5/6/2005 5/7/2005* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

5/8/2005 5/9/2005 5/10/2005 5/11/2005 5/12/2005 5/13/2005 5/14/2005* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

* MGA @ 0.5

mg/hd/day

* Many females in

heat next 4 days. DO

NOT BREED!

5/15 /2005 5 /16/2005 5/ 17 /2005 5/ 18 /2005 5/19/ 2005 5/20 /2005 5 /21/ 2005

5/22 /2005 5 /23/2005 5/ 24 /2005 5/ 25 /2005 5/26/ 2005 5/27 /2005 5 /28/ 2005

5/29/2005 5/30/2005 5/31/2005 6/1/2005 6/2/2005 6/3/20 05 6/4/2005* Detect Estrus &

Breed

* Inject PG - all

females

* Detect Estrus &

Breed

* Detect Estrus &

Breed

* Peak Estrus

* Detect Estrus &

Breed

6/5/2005 6/6/2005 6/7/2005 6/8/2005 6/9/2005 6/10/2005 6/11/2005* Detect Estrus &

Breed

* Detect Estrus &

Breed

* Turn in Bull Power

Date to start breeding:Start of Calving Season:

y

6 = MGA + Prostaglandin System (19 day b etween) Those 5 INPUTSresult in thedevelopment of thisBarn Calendar.


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Program Inputs for Cost Comparisons ofSynchronizat ion Systems. Either use thedefaults or supply your own costs.


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Treatment day

1 8 11

PGGnRH

16 = Select Synch + CIDR withE-AI and Cleanup AI

Detect Heat & AI

Days 8 to 11

CIDR Days 1 - 8

GnRH

Cleanup AI

72-84 hrs after PG


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Synch-06 Availabil ityFrom the Iowa Beef Center and participating states.Cost: $25 per CD, plus $10 shipping and handlingOrder Address:

Iowa Beef Center337 Kildee Hall, ISUAmes, IA 50011

Summary


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Summary

q The percentage of beef cattle AId is predicted to

substantially increase with the advent of sexed semen.q Current surveys indicate that fewer than 5% of thebeef cows in the United States are AI bred and onlyhalf of the cattlemen that practice AI use any form ofestrus synchronization.

q Historically the inability to predict estrus time forindividual females in a group often made itimpractical to use AI because of labor required forheat detection.

q The development of Fixed-Time synchronization

methods of AIing beef cows and heifers will increasethe adoption of AI.

Summary


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Summary

q This presentation is not intended to be either positive ornegative on synchronized AI

q But rather its purpose is to assist producers in thinkingthrough the options associated with estrussynchronization and what it takes to be successful.

q Least cost genetic improvement is what we all want.

q Whether synchronization fits a herd is dependent onmany factors Labor Herd as a candidate for synchronized AI Chute time & facilities adequacy

Cost of bulls vs AI

Documents

Estrus Synchronization (2)