Sex has been and continues to be one of the most important elements that differentiates the functions performed by members of society, particularly those related to the social division of work. From a strictly biological perspective, the primary difference between men and women lies in the fact that, during specific periods of the life cycle, women direct a considerable part of their energy to the reproduction of the species. Beyond this difference, the physical and intellectual capacities of men and women are relatively similar. Nevertheless, it is a general fact that the levels of male and female participation differ extensively.