![]() 3, 4 The aim of diagnosis and therapy for uterine infections is to identify and if necessary treat mares with compromised defenses before breeding and to aggressively manage endometrial inflammation post breeding. These barren mares, so called “susceptible” mares, are believed to have defects in their defense against reproductive infections. The embryo is unable to survive when it enters the uterus at day 6 (144 hours) post ovulation. 2 However, in some mares the inflammation is prolonged by the persistence of bacteria, and the mare may remain persistently infected on subsequent cycles. In healthy mares such inflammation is a normal postbreeding phenomenon and often subsides within hours post breeding. 1 The inflammation is most commonly caused by a mixture of semen, bacteria, extender, and debris introduced at breeding. ![]() The culprit in these infections is probably persistent endometrial inflammation that prevents survival of the early conceptus. The term uterine infections can apply to many conditions, but this chapter will focus on bacterial uterine infections causing infertility in the cycling mare. Consequently, successful prevention and management of uterine infections in the broodmare is an essential part of equine reproductive practice. In addition, the client does not have an item for sale in the future. The expense of breeding, palpation, ultrasonography, board, mare transport, semen shipment, stallion collection fees, and many booking fees can never be recovered if a mare fails to conceive. Infertility caused by bacterial uterine infections inflicts major losses on the equine industry.
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