Law requires and extra support from other sciences to the practice of a judiciary of assertiveness upon all the challenges from the community. This proposal is to outline a scientific work in a methodological complicity between law and sociology, with a multidisciplinary approach referring to the law and procedural phenomenon substantiated in the enforcement of the penalty of imprisonment, under question of the european criminal and penitentiary law. Our work describes the aspects of the prison as a current punitive model and integrates a qualitative and quantitative data from an investigation developed in an exploratory study. It presents an empirical law reflection of an analysis with an ethnographic focus obtained into the prison, from the penitentiary procedure of treatment of women, who are also mothers, in inmate context. Also, in the interdisciplinary bibliographical investigation, it promotes an intersection between law and a group of social sciences. Our aim is to show how relevant is, for law researcher, a multidisciplinary elements added is to the due normative efficiency.