I AM SO SLEEPY I DON’T KNOW WHAT TO SAY …
The term nuclear family is used to distinguish a family group consisting of most commonly, a father and mother and their children, from what is known as an extended family. Nuclear families can be any size, as long as the family can support itself and there are only children and two parents, or the family would be known as an extended family.
In China, the most populous nation in the world, the nuclear family is considered the most common family arrangement. In the more urban parts of India, the second most populous nation, the number of nuclear families is overtaking other forms of family arrangements, although unpopular among Hindu orthodoxy who advocate a form of extended family structure called the joint family. In the United States of America, the third most populous nation, just under 25% of family units are considered nuclear families.
Extended family (or joint family) is a term with several distinct meanings. First, it is used synonymously with consanguineous family. Second, in societies dominated by the conjugal family, it is used to refer to kindred who does not belong to the conjugal family. Often there could be many generations living under the same roof, depending on the circumstances.