I purchased a 9 yr old miniature mare this past fall. She had a dystocia several years ago and has not gotten back in foal since. I had a limited exam done on her before I purchased her and it showed a normal uterus and cervix. No scar tissue. However, the vet who examined her could not visualize her ovaries.
I'm wanting to have my vet do a full repro workup on her and he said first heat this spring.
The mare acts like she's in heat anytime she is exposed to a stallion through the fence. Squatting, urinating, etc. I have no idea if she is actually in heat or not.
Reading that Granulosa Cell Tumor is a possible cause of continuous heat, I wonder if that is the only thing that can cause this type of behavior? The mare otherwise acts normal. No stallion like behavior or characteristics, no abnormal aggressiveness, etc.
We're still very much in transitional stage time of year, so my bet is that she is either in anestrus (and submissive) or transitional. Those without a doubt are the most likely reasons and far preferable to hitting a panic button!!
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