Placentitis, with its subsequent complications, is a fairly common problem in the Equine. The ability to identify these mares early in the course of disease is inherently important in order to prevent loss of the foal, mare or both. Diagnosis should be made based on clinical signs and ultrasonographic evaluation of the placenta. Upon discovery, the mare can then be carefully managed to increase the likelihood of a positive outcome. For many mares, this management will take place on the farm and it is important to be aware of the most common complications in order to prevent them.