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
Endometritis is one of the most common causes of infertility in cattle. The type of endometritis varies with the type and amount of discharge. The most common isolates from infected uteri are staphylococcus and E. coli. Clinical signs cannot often be demosntrated by rectal or vaginal examination. The only consistent symptoms are anestrus and cloudy mucus.
Woodle, Dan E. and Johanns, Clarence J.
"Non-specific Postpartum Endometritis,"
Iowa State University Veterinarian: Vol. 35
, Article 10.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol35/iss2/10