In the census of the population, is counted as child of a family any person living within the same household (in the census's meaning) that its parents which whom the person constitutes a family or the person constitutes a family with, whatever its age, if it is unmarried and does not have spouse or alive child living in the household (with which it would constitute a family as an adult then). The family's child can be the two parents' child, the one of one parent or the other, an adoptive child, or a child in supervision of one or the other relative. No age limit is fixed to be child of a family. A grandson or a granddaughter is not considered as "child of a family". When all the children left the parental household, the couple is considered as a no child couple.