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How is that possible???

Equine-Reproduction.com Bulletin Board » Embryo Transfer » How is that possible??? « Previous Next »


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RachelFisher
Posted on Tuesday, February 27, 2001 - 02:56 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I am taking a Equine Production System class at Oregon State University. My professor mentioned that you could collect a embyro for ET every 16-18 days! How is this possible?? He has tried to explain to me, but for some reason, what he is saying isn't making sense! Chart wise, how would you represent this?
Thanks!
-Rachel
 

Jos
Posted on Tuesday, February 27, 2001 - 10:15 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Several time factors must be taken into consideration:

Embryos are flushed at about 7 or 8 days post-ovulation.

The Corpus Luteum will be present and active at the time of flushing and will respond to the use of Prostaglandin.

The mare will (should!) re-enter estrus in about 3 days after the Prostaglandin use.

The mare will (again should!) ovulate in approxomately 5 days after entering estrus.

So:

Ovulation to flushing and PGF2a use:7 days
Time to entering estrus:3 days
Estrus to ovulation:5 days
Total:15 days


This would be, on the average, an absolute minimum, so your Prof's 16-18 days is right on the money!

Hope this explains it for you!



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