I took one of my mares to have her bred. They tried and could not get her in foal by live cover. I brought her home and tried again by a i with my vet. He could not get her in foal either. He said her cervex would not open. He did not offer anything else. Is there anything else I can try. She is a valuable mare, but not so if she can't breed. Any info would be wonderful.
The first thing to be absolutely sure of is that the mare is indeed in estrus ("heat")! That should be done with ultrasound and possibly blood progesterone assays.
Some mares have tighter cervixes than others. One item that may be a factor is low estrogen levels during estrus - if the mare also does not demonstrate estrus well, that is very likely. Use of estradiol cypionate may relax the cervix and encourage estrus behaviour.
Another possible treatment is topical application of mysoprostol cream, which will relax the cervix.
Any good veterinarian specialising in equine reproduction should be able to help you with the above treatments.
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