Ayala Guanga, L., Pesántez Pacheco, J., Rodas Carpio, E., Méndez Álvarez, M., Soria Parra, M., Torres Inga, C., Vázquez Mosquera, J. and del Rocío Pesántez Calle, E. 2018. Size of Ovulating Follicle, Corpus Luteum and Blood Progesterone in Heifers Receiving Embryos from Three Grazing Breeds in Ecuador. Revista de Producción Animal. 29, 2 (Jan. 2018), 65-72.