The purpose of this paper is to show the usefulness of an alternative scientific argument based on Transcurssive Logic in the natural science, such as medicine. The auxiliary methodology was applied to determine the role of a polyvalent endometrial treatment in patients suffering from ‘repeated implantation failure’ in an ovodonation program. Secondly, this paper analyzes changes in the leukocyte endometrial population. We proposed a way of systematizing the process of embryo implantation and of scientifically addressing the repeated failure of implantation through adduction. This paper considered the dynamics of the natural and altered biological process and are evaluated the empirical results, beyond statistical findings. (Tersoglio & Salatino et al., 2015).