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How is conception date determined in mare?

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Jump to page : 		Last activity 2015-06-15 12:04 PM
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rockinas
Reg. Sep 2003
Posted 2015-06-15 8:17 AM
Subject: RE: How is conception date determined in mare?



Best of the Badlands


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Location: You never know where I will show up......		Most all of our foals born at our ranch are now embryo transfer.  We use the day of ovulation as the 'conception date'.  We flush the mares from 7-8 days post ovulation, so it is very important to know when they ovulate.
It is always recommendable to check them back and make sure they ovulate.   I have had several mares build huge follicles and then regress them without ovulating.  This happens a lot early in the season.  There are lots of other reasons to check them back too, double ovulation is one reason and post breeding fluid from delayed uterine clearance is another reason to be checking those mares back.  Most good repro vets will be doing that routinely. 
Realizing the "ignorance is bliss" approach seems to work for some people, I am not willing to take a chance on it for the time and money I have invested in our breeding program.
 
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OregonBR
Reg. Dec 2003
Posted 2015-06-15 12:04 PM
Subject: RE: How is conception date determined in mare?


Military family

Champ


Posts: 19623
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Location: Peg-Leg Julia Grimm		Amy ^^^  

 I just have one thing to add.  If you have your own stallion and you are teasing the mare back you can wait until they are 20ish days post last breeding to preg check them.  As long as they don't come back in heat, you're good.  But if you are shipping semen, you need to check on day 14-16 so you have time to order more semen for the next try. If you wait until 20 days to check you might (probably will) miss that cycle and have to short cycle her.  That said, I have a mare that goes 24ish days ovulation to ovulation.   So she has her own schedule.  

ETA: I count from the last known breeding date or the date of ovulation if we know what it is or isn't.  It's more likely I would know the ovulation date if we are breeding A-I because we "manage" them a lot more closely with A-I breeding.  

Edited by OregonBR 2015-06-15 12:12 PM
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