M. Lois Calhoun graduated with her DVM in 1939. She was employed in the Department of Anatomy at Iowa State College (University) from 1939-1943. Calhoun joined the Department of Anatomy at Michigan State College (University) in 1943 and by 1953, Calhoun was Professor and Head of that department. She also served a term as president of the Women's Veterinary Medical Association. (Iowa State Veterinarian, vol. 15, no. 3, 1953)