Within the traditional nuclear family, there are four main subsystems; 1)Marital- interactions among husband and wife or same-sex or domestic partners 2) Parental- interactions among parents or caregivers and their children 3) Sibling- interactions among children in a family 4) Extended family- interactions among members of the nuclear family, relatives, and others who are regarded as relatives. A strong marriage affects a family's overall well-being.There are different types of parental subsystems which include foster parents, adoptive parents, gay and lesbian parents, fathers and mothers. Traditionally, father's who are "present" and mindful when interacting with their children with intellectual disability are also more involved in the support and care of their child. For the extended family subsystem, the role of culture plays an important role. Cultures tend to define the composition of extended family and the frequency of contact between the nuclear and extended families. Grandparents can often provide a unique and important source of support, and yet there is limited information about their role and outcomes in families of children with disabilities.