A lone parent is defined as a parent who raises a child or children, and does not have a spouse or a live-in partner. Lone parenthood is one of the most important social trends in the 21st century in advanced industrial countries. Divorces, break-ups, abandonment, death of the second parent, childbearing by a single person or single-person adoption are various reasons for becoming a single parent. Families with children led by single parents are called lone parent families. This book studies and analyses the causes of lone parenthood and its significance in modern times. Such selected concepts that redefine the subject are presented here. For all readers who are interested in this subject, the case studies included in this book will serve as an excellent guide to develop a comprehensive understanding.