Title not available in English.

Abstract

In this article we use the social reproduction concept to reveal the effects of the demographic transition last phase in development countries. We discuss especially the initial impact of the ageing process on the domestic units organization and social security institutions. These institutions will receive in the next years the numerous cohorts of individuals who are coming in the third age in Mexico. We search the different social groups in third age, their relation with the labour market, the family and institutional resources. There are gender differences that characterize this age group into this heterogeneous context, because men and women assume different social roles into and out the family. As parental and social indicators we adopt parental relations, economic status, composition and structure of the domestic units. On the other hand, we compare with other countries the institutional support in Mexico, as the asylum and social security. Temporality of the individual and family life course is an important concern in the relation between ageing, family and society. The high life expectancy impacts the size, composition and structure of the domestic units, especially in the last phase of their life cycle. Couples survive although the third age and then dissolute mainly because the widowhood. In this step the head´s role, the size and structure of the domestic units are redefined according the gender differences reproduced demographical and socially.