Many parts of the world are experiencing rapid demographic restructuring, resulting in an ageing population with increasingly significant work and care pressures on cohorts less able or willing to provide support. This book examines some of the important trends that have underpinned reductions in fertility, including delayed child-bearing and increased childlessness. It demonstrates how relationships between partners have resulted in new living arrangements with changing attitudes from marriage to co-habitation as the social norm, and it considers the health and well-being for particular at risk groups such as the elderly and stepparents as well as aspects of mobility such as household migration and commuting to school.