My 8 year old Throughbred mare (with three previous live births) was bred on July 2nd and July 3rd and ovulated on July 4th. Then on July 13 and 14 she had this horrible discharge. At that time the vet said that she probably has vaginitis and perscribed 12 tablets twice a day of Sulfamethoxazole and Trimethoprim for 8 days. Her discharge went away after one treatment of this drug, we continued treatment for the full 8 days.
Last Friday, July 20th, on her 16 day ultrasound, it showed she was not pregnant. Her tone was tight and she had a follicle of 12 cm. She had no fluid in her uterius. The vet said that he thinks when she had the discharge, it was a midcycle follicle. Would anyone be able to explain to me what this means?
I would like to breed her one more time this year, but I think I need to do another biopsy, cytology and culture before I breed her. Does this sound like a good idea?
This past spring, when I did all three tests, her biopsy came back healthy with 80% pregnancy rating. She did have Strep. Zoo. which was treated and tested clear afterwards. (Just thought I should give you a little backround).
Like I said, I would like to breed her one more time. We've bred her 3 times so far and no luck.
Any thoughts regarding this mare? I need help with this one.
A theriogenologist is someone that is board-certified by the American College of Theriogenologists. Theriogenology is the study of reproduction (generally - not just equine). You can see if there is a theriogenologist near you by checking the listing for your location (follow that link).
Take a look at the article about hormones of the mare - it should help in your understanding of the mid-cycle follicle. In essence, the follicle is present because of a bi-phasic wave of FSH which causes a second follicular wave to develop during diestrus. It should not be bred upon, as the uterus is not prepared to receive the insult of semen, as uterine immune responses are suppressed and the cervix is closed tightly owing to progesterone levels being elevated. If one breeds on a diestrus follicle, there is a high likelihood of a major reaction (and quite possibly infection) in the uterus.
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