Can someone answer this question? I have had a sudden bloom of aslike clover in my pasture this spring. There were small amounts before, but never like this. We have had a lot of rain which may account for it. I read somewhere and can't find where, that aslike (white) clover can cause fertility problems similar to fescue. I have a mare that was cultured and found clean and ready to breed, but at her next heat period, she was open. Since it is so late in the year, I will let her go until next spring. I also had a mare that I bred the first week of Feb and she was checked back, but came back in heat in April, also to late to breed this year. This mare was cultured also. I can find no reason for this and both of these mares have been good producers for me. I did leave these two open last year due to the horse market prices, but I don't think that would have any bearing on this problem.
The issues related to Alsike Clover typically fall into two categories - photosensitivity and liver damage. Although endophytes may be associated with these conditions, I can find no reference to an impact on fertility. Generally it is agreed that it is better not to pasture horses on white clover.
You reference the mares as having been cultured, but what was the result of the cytology smear? Did you have a cytology smear performed? See this article on our web site for more details of the importance of a cytology smear being performed in conjunction with an endometrial swab culture.
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