Clay52
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I use sync programs simply because they work.
I can't argue with 60% of the herd pregnant on day 1 of spring breeding each year.
Metrichecking
- Thread starter Devon lad
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I use sync programs simply because they work.
I can't argue with 60% of the herd pregnant on day 1 of spring breeding each year.
Clay52
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Great work. Yep, keep doing what you are doing.
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- Pembrokeshire
Clay52
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What are you disagreeing with?
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60% of your herd pregnant on day 1 of spring serving .you leave in dream land
Clay52
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So what part are you disagreeing with.
With a sync program you set it up so that everything is bred on day 1. So submission rates of 100%.
With current sync programs conception rates of 60% higher are being achieved.
Therefore 60% pregnant on day 1.
Also I should have said 60% of spring herd pregnant on day 1. There is more of the herd actually pregnant.
But on no evidence or understanding it seems you want to discredit it for whatever reason.
Clay52
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A sync program doesn't guarantee you high conception. It guarantees 100% submission but if you don't transition the cows well or have a poor fertility herd it's not magic.
He does live in a dream land. I've been there.
Clay52
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The have done research on that by scanning ovararies though sync programs. Over 90% respond properly. That's likely more accurate than most people on heat detection.
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He always goes back to " they've done this research on this that and the other".ive used sync programs on heifers and had 86/93 % in three wks but never ever 60% on day one and this is heifers who haven't calvesd and are not loosing weight do to the constraints of having to milk
He is right. The problem with a lot of synchronisation programmes is that the cows can be at any place in their cycle when enrolled. It's ok, but it does mean a proportion of animals will not respond to conventional programmes. Various systems have been designed with a pre-synchronisation part to the programme, so that wherever the cow is in the cycle the pre-synch brings them all together - so they drop into the synch programme already partially synchronised.
It gives very good conception rates, but has a much higher drug cost. It may not be palatable to the consumer or the milk buyer using all the drugs. Not many vets seem as willing to hand over vast quantities of fertility drugs either. These are long protocols - some over a month long, with many carefully timed injections.
There is good research showing higher conception rates can be achieved with the pre synch programmes than achieved through mating on naturally detected oestrus. There are lots of farms struggling to get above 20% conception rate (especially in the US) - if they instigated such a programme they won't get 60% conception rate. If you take a very well managed herd averaging 50% conception rate then you might get the 60% pregnancy rate. You have to have everything else spot on.
It gives very good conception rates, but has a much higher drug cost. It may not be palatable to the consumer or the milk buyer using all the drugs. Not many vets seem as willing to hand over vast quantities of fertility drugs either. These are long protocols - some over a month long, with many carefully timed injections.
There is good research showing higher conception rates can be achieved with the pre synch programmes than achieved through mating on naturally detected oestrus. There are lots of farms struggling to get above 20% conception rate (especially in the US) - if they instigated such a programme they won't get 60% conception rate. If you take a very well managed herd averaging 50% conception rate then you might get the 60% pregnancy rate. You have to have everything else spot on.
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You wouldn't get 60% of your heifers to calve on day 1 and there under the least pressure. @clays cows do 10000 lts 60% isn't achievable
You wouldn't get 60% calve on day 1, but you could get 60% conceive on day 1 of breeding. They will calve over 10-14 days.
It is achievable. The question is whether its desirable or affordable. Particularly if we're talking about maiden heifers.
Clay52
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Of course they don't all calve on day 1. Lol. We all know that. Calving is usually spread over two weeks even though they are all due on the one day.
I like how you still say it cannot be achieved with zero evidence to back your stance. You not believing that it can be done is just your uneducated opinion because it's being done by people. I know it is achievable because the calves all fell out the back of the cows 9 months later. Haha.
I also know of housed herds doing 13,000lt average getting over 50% conception but you will say that's not achievable as well.
Clay52
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So we are at the bottom of it. You can't achieve it so that must mean no one can achieve it.
You do understand how sync programs work right? It's timed AI. So you set up the program so everything is bred on day 1 of breeding. If you get a 60% conception rate, which is achieveable, because 100% of the cows are bred Day 1 you have 60% pregnant on day 1.
Also sync programs are more difficult to get to work right on maiden heifers due to the three follicular waves vs cows two. We always had good conception in maiden heifers but now cows have caught up to them.
Even that's not consistent. Someone really ought to look into this and genomics.
Clay52
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As in some heifers having 3 and some have two waves, it makes heifers much harder to sync but their conception rates usually make up for it. Personally it's hard to bet natural heats on madien heifers. Or just a pg shot.
I would hate to tell @In the pit but I've had sync programs end up with 70% conception on cows and 60% with sexed semen.
Yes re the follicular wave stuff. Beef cows and heifers are typically 3 wave. A lot of the early work was done in Ireland in beef and it was assumed all cows were 3 wave.
Equally I suspect you've also done very much less with synchronisation. We have some farms that do consistently well, and then suddenly a crap result on a batch. Sometimes obvious why, but sometimes not.