Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
The value of dairy and beef cows depends upon their ability to reproduce healthy, viable calves at regular intervals. Since pregnancy is the greatest burden of reproduction, a healthy genital system is essential to realizing this value. The anatomical location of the bovine external genitalia plus the frequent insanitary husbandry in many dairies subjects this important system to infection.
"Metritis and Pyometra,"
Iowa State University Veterinarian: Vol. 8
, Article 5.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol8/iss1/5