At present, it is necessary to produce more milk per cow per year more efficiently, due to the undeniable improvements in the dairy industry; in nutrition and food, mainly in formulating rations for animals, according to production levels, as high, medium and low; as well as genetic herd. However, these improvements have resulted in problems, the results of which usually has been, the presence of reproductive problems, resulting in general terms, low reproductive and productive performance of the animals. Despite the advances that exist today on feasible technologies applied in breeding and animal production, few farmers or ranchers have shown concern for improving the general environmental conditions of their Units of Animal Production, without taking into account that these conditions are largely responsible for animal health, welfare altering them and impacting significantly in the presence of problems of reproductive and productive nature, significantly increasing production costs in the dairy industry. In this paper, some causes that may lead to low fertility in cows are described.
