The family is one of the oldest and stable forms of human living that ensures the perpetuation of humanity, evolution and continuity of social life. The social dimension of the family describes the relationship system in the couple, between parents, children and other siblings. Complex relationship systems are established between conjugal partners, ascendants and descendents and between members of nuclear family or other distant relation. The family has its own limits and boarders. Each family member is part of different systems and subsystems, which involve assuming different statutes, roles and interactions.