Effects of intrauterine devices on proteins in the uterine lavage fluid of mares - Rivera del Álamo, Maria Montserrat (Universitat Autònoma de Barcelona. Departament de Medicina i Cirurgia Animals) ; Katila, Terttu (University of Helsinki. Department of Production Animal Medicine) ; Palviainen, M. (University of Helsinki. Department of Production Animal Medicine) ; Reilas, Tiina (Natural Resources Institute Finland)