Ovarian hematoma in mare - case report

Abstract

ABSTRACT The aim is to report a case of ovarian hematoma in a female equine, Brazilian Sport Horse breed, 5 years old. The mare was in her third breeding season, with a history of good fertility in previous seasons. During reproductive monitoring, the animal showed regular growth of follicles. In the presence of a dominant follicle (44x39mm) in the right ovary, synthetic prostaglandin was administered. After 24 hours, the right ovary showed an increase in size and sensitivity. On ultrasound, a well-defined echogenic structure (66x54mm) was observed, with a uniform internal appearance. The structure showed gradual growth for 8 days, reaching 71x52mm, when it began its gradual regression and disappeared 14 days after its finding, without any treatment. The mare remained cycling and showed estrus 3 days after the disappearance, containing 2 pre-ovulatory follicles, one in each ovary. Ovulation was induced, culminating in bilateral ovulation. Artificial insemination was performed with frozen semen, at the tip of the left uterine horn, avoiding the compromised ovary. The gestational diagnosis was positive with one embryonic vesicle. Ovarian hematoma is a common finding and does not cause harm to fertility; however, its knowledge is essential for the differential diagnosis.