This news item is about: All over the world, horses are bred for speed, endurance, and strength, but at the Baker Institute Dr. Doug Antczak and his colleagues breed horses for their immune systems. Antczak’s research focuses on the interactions between mother and fetus, work that has revealed important information about the placenta and new insights for advancing organ transplantation. Foals Rhaegar and Rickon (right, whom the barn staff named for characters from the popular television series Game of Thrones) are two of the latest additions to the herd.