Which GnRH do you use?

[ccbr01]

Our AI program needs to be revamped. For the only two times we have AI our cattle, we have only had about a 20% pregnancy rate (and that stinks when we waste Objective units). The process we used was mentioned to us by our vet is: CDIR for seven days, removal of CDIR and inject lute, and wait 60+hr until signs of heat det and AI the group of cows all at once.

I've been doing some research on GnRH. The big three (Genex, ABS, and Select Sires) have GnRH in there Synchronous Protocols. Which GnRH would you all suggest and how would it be administered? From the Synchronous Protocols sheets, we are thinking about doing a "Fixed-Timed AI" this December. Have any of you all completed this process and what is your success rate with this?

Also from the looks of it, Estrumate (from another thread) seems to be the winner over Lute. I'll be doing more research on this in the coming week. :)

Thanks

 

[dun]

On the rare occasion we use shots to induce heats we use Cystorelin and Lutelyze. We've never had a falure to cycle with this combination and never had a miss settling that I can recall. I think the protocol is called "Select Synch"
We;ve used CIDRs twice, waste of money, only one came into heat and she didn;t settle to the live service.

 

[redcowsrule33]

We have done co-synch w/ CIDR for years with great results. Will get heifers cycling. Works fine on cycling cows. Poor results with cows that aren't ready for one reason or another to cycle. We breed on heats and timed AI non-responders @ 72 hours. We use estrumate (prostaglandin) and cystorelin (GnRH).

 

[CKC1586]

On the rare occasion we use shots to induce heats we use Cystorelin and Lutelyze. We've never had a falure to cycle with this combination and never had a miss settling that I can recall. I think the protocol is called "Select Synch"
We;ve used CIDRs twice, waste of money, only one came into heat and she didn;t settle to the live service.

Same experience here dun with the cidrs. We use Lute.

 

[KNERSIE]

Our AI program needs to be revamped. For the only two times we have AI our cattle, we have only had about a 20% pregnancy rate (and that stinks when we waste Objective units). The process we used was mentioned to us by our vet is: CDIR for seven days, removal of CDIR and inject lute, and wait 60+hr until signs of heat det and AI the group of cows all at once.

I've been doing some research on GnRH. The big three (Genex, ABS, and Select Sires) have GnRH in there Synchronous Protocols. Which GnRH would you all suggest and how would it be administered? From the Synchronous Protocols sheets, we are thinking about doing a "Fixed-Timed AI" this December. Have any of you all completed this process and what is your success rate with this?

Also from the looks of it, Estrumate (from another thread) seems to be the winner over Lute. I'll be doing more research on this in the coming week. :)

Thanks

This may sound a very silly question.....

...but why not just follow the directions on the back of the package the CIDRs were bought in?

A 2.5cc shot of Fertagyl or Receptall at AI will improve the results. The suggested GnRH to use with CIDRs is Cidirol as per the directions on the package.

 

[dun]

...but why not just follow the directions on the back of the package the CIDRs were bought in?

The suggested GnRH to use with CIDRs is Cidirol as per the directions on the package.

Same company make both products maybe? Ford recommends you use Ford parts!

 

[novaman]

I use Cystorelin. The past two years I used the protocol CIDR's on my heifers the past two years and had terrible luck with it. This next year I'm scrapping the whole protocol and going to a single dose of Estrumate. It will be cheaper, less times through the chute, and I know they will come into heat and stick. I can't say the same for CIDR's. Just as a note, your conception will be lower on a TAI than on observed heats.

 

[cowwrangler]

I use Cystorelin. The past two years I used the protocol CIDR's on my heifers the past two years and had terrible luck with it. This next year I'm scrapping the whole protocol and going to a single dose of Estrumate. It will be cheaper, less times through the chute, and I know they will come into heat and stick. I can't say the same for CIDR's. Just as a note, your conception will be lower on a TAI than on observed heats.

thats the protocol i went to also after the ciders,they are a waste of time and money

 

[whitecow]

Guess I've been lucky. I managed a 900+ hd recipient herd for several years and our preferred method of synchronization was CIDRs. Never had a problem. I still use CIDRs to sync my Charolais heifers for AI and for sync'ing my own recips. Seems to always work (knocking on wood!!!). As for GnRH, I've used both Cytorelin and Factrel. Both worked fine. I use Cystorelin most of the time now because I can get it cheaper.

 

[Willow Springs]

I use Cystorelin. The past two years I used the protocol CIDR's on my heifers the past two years and had terrible luck with it. This next year I'm scrapping the whole protocol and going to a single dose of Estrumate. It will be cheaper, less times through the chute, and I know they will come into heat and stick. I can't say the same for CIDR's. Just as a note, your conception will be lower on a TAI than on observed heats.

I use the one shot PG system as well. I have tried CIDR protocals and Co-Synch as well from time to time. In the end I get the same amount of AI calves with the one shot system with about $15-20 less drug cost per head, less semen used because I only breed on heats, and 2 less trips through the chute (and splitting calves). You do use a bit more time heat checking, but it is not huge in my opinion because it is only for a few days. I have also had more trouble getting cows to settle on their cycle after the mutiple drug treatment systems, and quite often the ones that don't become pregnant in the system will not calve until the 2nd cycle after the program.

 

[Angus In Texas]

(and that stinks when we waste Objective units).

In my opinion you aren't wasting Objective units but doing a service to the cattle industry by disposing of them without propagating the lack of muscling from the flank back that Objective sires. I have never understood what breeders see in Objective other than the outlier EPDs...... I can't stand his phenotype personally.

 

[angus9259]

On the rare occasion we use shots to induce heats we use Cystorelin and Lutelyze. We've never had a falure to cycle with this combination and never had a miss settling that I can recall. I think the protocol is called "Select Synch"
We;ve used CIDRs twice, waste of money, only one came into heat and she didn;t settle to the live service.

Why cystorelin AND lute then . . . why not just lute? Unless you're wanting to jumpstart ovulation?

 

[dun]

On the rare occasion we use shots to induce heats we use Cystorelin and Lutelyze. We've never had a falure to cycle with this combination and never had a miss settling that I can recall. I think the protocol is called "Select Synch"
We;ve used CIDRs twice, waste of money, only one came into heat and she didn;t settle to the live service.

Why cystorelin AND lute then . . . why not just lute? Unless you're wanting to jumpstart ovulation?

Using GnRH basicly restarts the cycling clock (folicular wave) so that everything is on the same page when it comes to inducing heat. If it they are outside of the window that PGF2 is effective it gets them to the point that it is. Also will address the anestrus issue.

 

[ollie?]

Also will address the anestrus issue.

Tell me what you know.

 

[novaman]

Also will address the anestrus issue.

Tell me what you know.

It treats cystic ovaries.

 

[dun]

Also will address the anestrus issue.

Tell me what you know.

It treats cystic ovaries.

Anestrus is the opposite of cystic ovaries. It will force the animal to shed the existing CL and start a new follicular wave.
It only works on previously cycling cows won;t do squat on heifers that have never cycled.

 

[novatech]

Anestrus is the opposite of cystic ovaries. It will force the animal to shed the existing CL and start a new follicular wave.
It only works on previously cycling cows won;t do squat on heifers that have never cycled.

Will a cow shed a cystic ovary on her own?
Do some cows continue to get cystic ovaries?
Is the tendancy for a cow to get cystic overies genetic?

 

[dun]

Anestrus is the opposite of cystic ovaries. It will force the animal to shed the existing CL and start a new follicular wave.
It only works on previously cycling cows won;t do squat on heifers that have never cycled.

Will a cow shed a cystic ovary on her own?
Do some cows continue to get cystic ovaries?
Is the tendancy for a cow to get cystic overies genetic?

I;ve never seen one do it one their own. They just keep cycling every 7-14 days.
We've only had a couple of them get cystic and never had one repeat.
Have no idea on the last question.

 

[novatech]

I was asking because I have a cow that has had a cystic ovary for 3 years in a row. I treat her with cystorelin and lute then AI her. She takes first time every time. She stays butter ball fat most of the time. Vet says that poor cows are more susceptible to it.

 

[dun]

I was asking because I have a cow that has had a cystic ovary for 3 years in a row. I treat her with cystorelin and lute then AI her. She takes first time every time. She stays butter ball fat most of the time. Vet says that poor cows are more susceptible to it.

Have you kept an of her daughters?