A growing body of literature confirms that the couple relationship is a crucial aspect of effective coping with chronic health problems. Common serious illnesses like heart disease, breast and prostate cancers, and diabetes have physical sequelae that profoundly affects the couple relationship. Each of these diseases can affect sexual functioning, capacity to undertake work, and other major role responsibilities. Concerns for the patient and their spouse about the physical and psychological effects of treatments, the possible threat of death or disability are raised. The extent to which partners are able to support each other psychologically and emotionally through these challenges has a huge impact on quality of life. The extent of successful couple coping can even influence the course of the disease in some instances. For example, partner support can greatly influence adherence to potentially lifesaving treatments, adoption of important life style changes, and effective stress management, which in turn can affect health outcomes. The Springer Series in Couples and Health provides practical guidance to a range of health and mental health practitioners. The series aims to distill the research on how couples, patients, and partners manage chronic health problems effectively, and use it to provide practical, evidence-based guidance and information.