A mono-parental family represents a single-parent family with one or more children. The concept of a single-parent family has quickly set itself apart from other concepts such as: isolated parents, women-headed households, single mothers in difficulty, unmarried mothers, environmental household, mono-parental household. The mono-parental family is a preferred name to those of "disorganized family", "broken family", "incomplete family" or "dissymmetric" family. An important aspect in defining the features of single-parent families is its functional capacity. One of the prerequisites for the one-parent family as a subject of social assistance attention includes all those government regulations that through successive adjustments provide social security benefits and those based on social service testing.