I recommend that you read this paper. Mastitis and fertility in cattle - possible involvement of inflammation or immune activation in embryonic mortality. Peter J Hansen; Paolete Soto; and Roger P Natzke DOI: 10.1111/j.1600-0897.2004.00160.x Mendeley URL: http://www.mendeley.com/research/mastitis-fertility-cattle-possible-involvement-inflammation-immune-activation-embryonic-mortality/