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Implement Alley Discussion Forum

Free Martinism

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Michael Soldan

07-21-2005 18:30:47




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I asked a question about free martins a year or so back and got educated from you cattle guys. this week I had a cow drop twin calves and you guessed it, a bull calf and a heifer. Although I understand the concept, is it automatic that the heifer will be sterile or is there just a percentage chance that she will? Neither will be kept for breeding stock, just curious...Mike in Exeter Ontario




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cannonball

07-23-2005 05:03:31




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 Re: Free Martinism in reply to Michael Soldan, 07-21-2005 18:30:47  
try here they might help... Link have nice day may god bless



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Allan in NE

07-22-2005 13:20:32




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 Re: Free Martinism in reply to Michael Soldan, 07-21-2005 18:30:47  
Michael,

Now, ya wanna know the kicker? This happens in humans also.

Allan



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Roy in UK

07-22-2005 22:54:54




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 Re: Free Martinism in reply to Allan in NE, 07-22-2005 13:20:32  
We had quite a few freemartin and therefore non-breeding heifer twins to bull calves and I used to wonder if it was true for humans too. But I had a teacher at school who had 3 children, 2 of which were boy-girl twins. They are both married and have kids of their own now.



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Roy in UK..... however

07-22-2005 23:04:11




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 Re: Free Martinism in reply to Roy in UK, 07-22-2005 22:54:54  
I just remembered, we did have a breeding cow that herself was in fact a twin to a bull, when I mentioned it to a vet he said it was rare that the heifer calf would be able to breed, but not unknown. I suppose its the case with humans too, just a percentage can have offspring.



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JMS/MN

07-22-2005 20:06:36




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 Re: Free Martinism in reply to Allan in NE, 07-22-2005 13:20:32  
I've never paid attention to boy-girl twins, but Mom always said, with twin girls, only one will likely have offspring. Never did tell me why.



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RN

07-22-2005 21:36:36




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 Re: Free Martinism in reply to JMS/MN, 07-22-2005 20:06:36  
I've twin sisters- both provided nieces and nephews.



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Jimmy King

07-22-2005 12:19:26




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 Re: Free Martinism in reply to Michael Soldan, 07-21-2005 18:30:47  
Michael, when it is about 4 months old a DVM can tell you in a hurry if it is a Freemarten or not.



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JMS/MN

07-22-2005 08:00:03




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 Re: Free Martinism in reply to Michael Soldan, 07-21-2005 18:30:47  
I've always heard the 10 per cent deal too. When they are big enough you can have a rectal paplation done- the reason they don't breed is because they simply don't have the female reproductive organs. Testosterone in the developing bull calf overrides the estrogen in the heifer, so the organs do not develop. Out of all the twins and triplets in 30 years of dairy, I had one fertile freemartin. What I don't understand is watching a cattle buyer determine at the auction barn that a heifer is a freemartin and refuse to bid on it. Says they look different.

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paul

07-21-2005 22:06:04




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 Re: Free Martinism in reply to Michael Soldan, 07-21-2005 18:30:47  
I've also heard the 1 in 10 deal.

--->Paul



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Larry806

07-21-2005 19:12:03




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 Re: Free Martinism in reply to Michael Soldan, 07-21-2005 18:30:47  
I've always heard that 1 in 10 will breed But I raised cattle for years and never saw one that did. I used to buy 3 day olds and the dairymen gave me the freemartins on the deal that if they would breed they got them back at beef price. I've saw enough that didn't maybe you will have one that does, just don't let her get to fat to early.



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