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 terminology concerning defects or abnormalities in cattle can render confusion if there is a not a distinction between the adjectives congenital and hereditable. The word congenital is derived from the Latin words con and genitalis. Con means with or together and genitalis means to beget or reproduction. Thus the word congenital describes those conditions which are present at birth as a result of the developmental process.
Filkins, Mylon E.
"Congenital and Hereditable Defects Which Interfere With The Reproductive Efficiency Of Domestic Cattle (Bos tarus),"
Iowa State University Veterinarian: Vol. 27
, Article 5.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol27/iss2/5