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Frozen semen "stats"

Equine-Reproduction.com Bulletin Board » Frozen Semen » Frozen semen "stats" « Previous Next »


Author Message
 

Jamie Anderson
Neonate
Username: Jamieander

Post Number: 2
Registered: 04-2008
Posted on Thursday, July 17, 2008 - 08:40 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Hi all...

I had a quick question about "average pregnancy rates" with frozen semen.

I read in a review a couple of months back that the industry average per cycle conception rate with frozen semen is 34%... now, what does that actually mean? Does it mean:

1) That on average, it will take three "perfect" attempts to produce a pregnancy

or

2) That on average, it will take three attempts end of story, and the conception rate takes into account mistimed inseminations etc.

I'm guessing that only data from experts/proficient AI centres are used in creating these stats...

The reason I ask, is that we had some frozen semen recently that did not produce a pregnancy despite the fact that it was inseminated 4 hours before ovulation in two mares. The stud manager was convinced that the mare would take, as the semen looked good, AI was at an ideal time, and the mares were easy breeders. I could not convince her that they might not take on the first try, simply because it was frozen semen. No pregnancy first time, and she panicked (and made me panic)... second round, mares AI'd 6-8 hours before ovulation, and bingo, 2 pregnancies...

Any thoughts?
 

paula mcrae
Neonate
Username: Paulamc

Post Number: 5
Registered: 04-2009
Posted on Friday, May 29, 2009 - 08:21 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I think this means it can take up to 3 inseminations to get a pregnancy.

Of course being a statistic it does not take into account all variables, such as some mares will never take to frozen semen, and many others will usually take on the first insemination if every thing else is right

Personall i never do 3 insems to get a pregnancy, i do 2 and if it doesnt work, change to chilled semen

Also, just because the semen has good motility under the scope, does not mean it is 'fertile' enough to join with the egg of the mare

Semen that looks bad under the scope can actually get mares pregnant

After having spent thousands of dollars with vets over the years, i now have my own set of rules about using frozen semen. Vets will always go ahead and inseminate, they get paid anyway, but i now tend to cut my losses early. If a mare is a bad candidate i dont go on endlessly inseminating like i used to, i will try twice, then either switch to another stallion or try cooled semen, or just try once more next season. if she still doesnt take, thats it for that mare in the frozen semen department

paulamc



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