Sorry if this might be better suited to the health forum...I couldn't decide.
We have had our mare for coming on three months now and she has not gone into heat once. Some people tell me mares tend to go off their cycles during the winter...and some say they don't. The two other mares on the property are cycling regularly.
I suppose the stress of moving to a new home might make her skip, but it has been a while and she has settled in...so if that was the case, she probably would have gone into heat by now?
When we first got her, we learned that she had been bred 5 months prior and had a vet check her. She was clean, "ovary to ovary", and when we finally contacted the people who bred her, we were told there was a strong possibility that her former owner had terminated the foal (long story).
Could a termination mess with the heat cycle? What other things may cause a mare to skip (besides the obvious. I'm fairly certain the vet would have found a fetus when she was checked at 5 months).