I just sent my mare back to the breeders for our 4th try. The mare is clean, good reproductive soundness, has a foal at side, and has conceived on 1st cover with her last two foals. I picked up semen on the last try...and had my vet check it...before breeding my mare. He said there were not many sperm present, but they were active...and it only takes one. My mare had a soft 40 follicle that day and he gave her a shot to induce ovulation. This was day 17 since that last insemination. She has been given a shot every time to induce ovulation...I am wondering if this could be somehow causing a problem. Should'nt we let her ovulate on her own. Everytime the stallion owner bred her, they also have her a shot. The stallion is old...and I am finding out has had settling problems for 3 years. The breeder is splitting his collections about 3-5 ways...last insemination we got less than 30cc. I am in a stiff contract and will lose about $3000 if I walk away. Any suggestions on how to help her settle would be great.
Jos Posted From: 126.96.36.199
Posted on Sunday, August 10, 2003 - 01:46 pm:
Insemination volume (or lack thereof) is not an issue, and in fact, the lower the insemination volume the better off one often is. The major issue is the number of viable sperm in the insemination dose. Research has shown that inseminating with fewer than 100 million progressively motile fertile sperm will depress pregnancy rates.
With respect to the use of hCG to stimulate ovulation - as long as the mare is being checked, and ovulation confirmed, there is no reason not to use it. There is no connection between hCG use and lowered fertility - in fact, the incidence of twin ovulations is marginally higher with the use of hCG, and although that sounds like a bad thing, as there is a 97% success rate in twin reduction to singleton pregnancy (either naturally or using human intervention), it actually increases your chances of pregnancy dramatically.
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