Days After Embryo Implant To Call Her Bred

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pweaver

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Jan 26, 2009
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155
We just got our results from preg checking using the blood test and are 3 for 3 being pregnant on the recips.  Two of the three were implanted 28 days when we drew the blood, the third 47 days.  I realize embryonic death can occur about anytime, especially in the heat of the summer.  And when buying pregnant recips, they will sell them as bred at the 90 day mark.  My question is, when can I relax and say they are bred with an ET calf, barring any unusual event?

Also somewhat related, has anyone else seen a lower than usual conception rate this year?  Out of 8 A.I.ed cows, we had 5 showing open.  3 of the 5 we expected after seeing the clean-up bull tailing them, but the other 2 were surprises.  We'll draw blood again about mid August on these 5 to see how the bull did.
 

Limiman12

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Jan 8, 2012
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SW. Iowa
276 days after implant and you are safe.  ;D.    We seem to lose a few every year at 45 days
 

big-uns

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Jul 2, 2014
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Personally I prefer to have my recips confirmed via ultrasound so I can see the heartbeat. If seen people abort pregs from blood checks and palpations.  I think the average loss after 60 days is around 5-7% but recips maintenance is vital.

 

DCC show cattle

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Caldwell, Tx
I don't trust blood testing for pregnancy. Get someone to ultrasound and there will be no questions for the same money you could tell if your 45 day preg is a bull or heifer.
 

pweaver

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Jan 26, 2009
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155
I don't understand how drawing 2 cc. of blood is going to abort.  That's why I blood test and not palpate.  Ultrasounding would be my method of choice but there's no ultrasound tech near me, and frankly, if they're bred, they're bred.  Knowing the sex isn't going to change how I manage the recip and with the genetics of the embryos, a bull might be about as good as a heifer.  Don't mean to sound argumentative, but I fail to see the logic in your comments.

As for accuracy, the blood test results have been 100% the past two years for us.  Late term abortions can happen, but they wouldn't be the result of pulling blood 6 months before.  Tell me your reasoning for drawing blood causing abortions.
 

big-uns

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Jul 2, 2014
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Not saying the blood test would cause to abort but what do you do with the females that are open?  Most breeders set those females back up and generally use lute or Estrumate which can abort a pregnancy during the first 100 days.  I have seen too many false positives/false negatives and palpation errors to take a chance with my genetics.  I want to know for certain that female is open or preg. 

Yes, it is possible to lose late term but generally the loss is 5-7% after 60 days. Recip maintenance is extremely important but extreme conditions can also affect the outcome. I prefer not to preg my recips until at least 35-40 days and that's only if I want to transfer more embryos so not to impose any added stress on the recip. 

That is great that you have been successful with the blood test and hope your success continues.   
 

pweaver

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Jan 26, 2009
Messages
155
Ok, I can see where you could mess up a good thing if the result was negative when in fact she is pregnant and you set her up with drugs to rebreed or implant.  We only try our recips once then let the bull have them or wait for a natural heat to A.I. or maybe implant.  So as I said, you're flirting with throwing away what you were striving for if you resynchronize.

We tested now, prior to 60 days, to see what we have A.I.ed and implanted.  From here on it's bull bred or maybe a late A.I. calf.
 
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