Dairy production systems pursue as one of their main objectives to achieve maximum productive and therefore economic profitability of rodeos in general and their cows in particular. The factors involved with health (health) have been and continue to be studied by various groups of researchers distributed across all continents, and mostly related to reproductive health by playing an important role in the correct productive behavior (LeBlanc, 2008), since cows have to give birth at regular intervals that allow increasing the individual and total production of the herd (Palmer, 2008). In this way, any reproductive problem will have an impact on production. The uterus during peripartum and postpartum is infected by a generally ascending invasion of microorganisms from the cervix, vagina, vestibule and perineal region. Most of these infections are generally resolved by the defense mechanisms of the uterus (Sheldon et al., 2008), which are divided into anatomical barriers as a barrier by closing the vulva and cervix, and on the other hand immune system mechanisms of cellular and humoral type (Drillich, 2007). In the same sense Kasimanickam et al. (2004) highlights neutrophil polymorphonuclear cells as the first line of defense against the invasion of the uterus in the postpartum of pathogenic microorganisms with the consequent increase in these inflammatory cells in the uterine lumen.