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Sperm tenacity?!

Equine-Reproduction.com Bulletin Board » General Mare Questions - Volume 2 » Sperm tenacity?! « Previous Next »


Author Message
 

Mood Swings
Yearling
Username: Mood_swings

Post Number: 60
Registered: 12-2006
Posted on Thursday, April 12, 2007 - 06:52 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Okay sorry about the subject title :-) I couldn't think of anything else! One of the mares was at the farm was covered on Monday, she had a 4.1 cm follicle. She was rechecked on Wednesday and had not ovualted, however her follicle was smaller and she had less edema (so she was going to ovualte soon). In optimal conditions I would have liked her to be covered again unfortunately the stallion was a very busy guy and they couldn't book her until the following morning (too late by our vets estimation). Sooo how long under the best circumstances can the sperm survive? She was covered 43 hrs prior to being ultrasounded for ovulation.

Thank you :-)
 

Jos
Board Administrator
Username: Admin

Post Number: 1250
Registered: 10-1999
Posted on Friday, April 13, 2007 - 04:00 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

It's generally agreed that with fresh semen 36-48 hours is "average" for sperm survival in utero, although much longer than that has been recorded - with pregnancies achieved through ovulations as much as 6 days after breeding!
 

Mood Swings
Yearling
Username: Mood_swings

Post Number: 61
Registered: 12-2006
Posted on Friday, April 13, 2007 - 10:49 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Wow - 6 days?! Guess you wouldn't want to stand too close to that stallion LOL :-) I'll keep my fingers cossed. Thanks

The word I could not think of yesterday was - viability (the light bulb finally went off).
 

Saffron
Breeding Stock
Username: Saffron

Post Number: 191
Registered: 01-2007
Posted on Friday, April 13, 2007 - 01:32 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

sorry i am sure this has been answered before but how long does cooled semen last?(in utero)
 

Jos
Board Administrator
Username: Admin

Post Number: 1251
Registered: 10-1999
Posted on Saturday, April 14, 2007 - 10:37 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

There's variability with cooled semen viability as well, plus one has to consider how long after collection the insemination takes place as well as the quality of the shipment.

Assuming overnight delivery and good shipment quality, 24-36 hours is a realistic anticipation of duration of viability in utero.
 

AmyandBrett
Neonate
Username: Rockinas

Post Number: 6
Registered: 01-2007
Posted on Sunday, May 27, 2007 - 10:41 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I have AIed mares here at our ranch with semen that had been cooled, that was 72 hours old, and it worked. It was still maybe 20% motile, give or take. The mares were right close to ovulation when they were bred. I wonder how long that stuff is alive in the mare, when it has been cooled previously and for that many hours before it is inseminated.....
 

Jos
Board Administrator
Username: Admin

Post Number: 1336
Registered: 10-1999
Posted on Monday, May 28, 2007 - 05:17 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

There's no solid answer for that - it will vary with the stalion and the mare.



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