Compléter Family LifeVersion en ligne Read the text and fill in the gaps by clicking par Evelina Santesson 1 Nowadays wedlock prevalent increasing rearing fulfillment retirement consisting making rates breadwinner milestone nuclear The family is the traditional family structure in the West . This term , originating in the 1950s , describes families of a father , a mother , and their offspring . Under this structure , the family is seen as the basic unit in society ; the father functions as the and the mother as the homemaker . , alternative family types are becoming more , such as single - parent families , families headed by same - sex parents , and extended families where families live with their kin , which may include several generations . Extended families are less common in North America , where it is not uncommon to place grandparents in homes . A Social Trends survey in 2009 reported radical changes in child and marriage practices in the United Kingdom . Figures showed that while 30 percent of women under thirty had given birth by the age of 25 , only 24 percent had tied the knot . This marked the first time childbirth had become the first major in adult life , ahead of marriage . In 1971 in the U . K , 3 / 4 of women were married by the age of 25 and half were mothers . Judging by the high of divorce and the number of children born out of , it would appear that the family as an institution is in decline . American sociologist Stephanie Coontz believes so too , but for different reasons . Coontz points out that marriages are no longer arranged for political or economic reasons , and children are no longer required to contribute to the family income . Marriages nowadays are founded on love . She believes this shift towards love and free choice has actually weakened both the family by it optional and the bond between the husband and wife by making it contingent on emotional .