From a doctrinal perspective and based on a case study, this article analyzes the way in which the best interests of the minor has become an important principle of interpretation in Mexico’s legal life. This is observed in the evaluation of different situations in which the federal Judicial Branch has resolved conflicts dealing with fundamental rights, taking into account family law-related issues. Moreover, there are important cases that neither the state nor local courts have resolved as they specifically deal with the protection of minors in the printed media. Therefore, as of the constitutionalization of Civil Law, the traditional form of this particular branch of law has been revised, considering the rescue of the person and in compliance with the international treaties that Mexico has signed, as a form of legal argument.