In recent years, womens' roles have changed dramatically, prompting researchers to examine the impact of these changes on the development of women and children. In this article, we examine three major changes that women have experienced over the past several decades: increased participation in the paid labor force, changes in domestic labor and child-care patterns, and increased numbers of female-headed single-parent families. For each, we first describe the nature of the changes that have occurred over the last 50 years. We then review research concerning the effects of these changes on the development of women and children. Finally, we discuss the implications for social policy that stem from this research. It is broadly concluded that research informed by a developmental–contextual perspective may contribute importantly to the development of social policies focused on promoting the well-being of women and children.