The placenta represents the major communication between the mare and the fetus during the gestational period, and this suggests that any disturbance in the placenta can be an indicator of gestational damage with risk to the fetus. The aim of this paper was to evaluate the clinical and metabolic responses of the newborn foals related with the findings from the histopathological examination of the placenta. This study was conducted in a farm located in Bagé-RS, Brazil, where were evaluated two groups of Throughbred mares for this case-control study: One Problem Group (N=25) and the Control Group (n=25), based on the placental findings. The foal's evaluation was based on general clinical examination, hematology and serum biochemistry. Results from the placenta histopathological exams were compatible with clinical presentation of the foals, with the presence of inflammatory lesions resulting in the production of debilitated foals. The presence of degenerative lesions in the placenta does not compromise the clinical features of the newborn, but they can be responsible for the manifestation of sub-clinical disturbances, evidenced by increased levels of AST and GGT. Urea seems to be an indicator of renal damage due to placental insufficiency in neonatal foals.
foal; placenta; metabolism; histopathology