The quality of semen used in dairy herds in our region will be studied. The quality will be evaluated on doses in storage at each facility and marketing on doses different AI centers, since this process has implications on the seminal quality of them. The quality parameters will be evaluated variables correlated with fertility and production, in order to infer the impact of sperm in breeding and production, the two supporting pillars of any dairy farm. The fundamental contribution will know the potential fertility is the semen that is currently used in stables of small and medium milk production and our own region.

The physicochemical properties of cervical mucus are a practical indicator to know if the time at which a female inseminates is the most appropriate with respect to ovulation, ensuring its pregnancy and making compatible changes in mucus in the periods close to ovulation that determine the greatest sperm receptivity favoring fertilization. All comparing spontaneous and induced heat and female reproductive categories in relation to productive variables. The results are expected to contribute to further consolidate knowledge about the fertility problem of dairy cows and to allow both teacher-researchers, consultants, students and the group of producers participating in this project, to establish a continuous interaction tending to improve the quality of life in the region. In addition to allowing the insertion of research groups in regional issues contributing to the development of possible solutions that the UCSM must respond.

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.