This briefing summarises a report looking at relationships between parents and their impact on families. The report provides: a brief overview of some recent relevant statistics; an outline of the types of research we used, including definitions (e.g. of types of relationships) and what was included or excluded by the literature; a review of the research findings under themed headings; and discussion points to start conversations about how families can be better supported. The report presents a review of research evidence to help inform voluntary and public sector agencies in the development of services. It has been produced by About Families, a partnership which seeks to ensure that the changing needs of parents, including families affected by disability, are met by providing accessible and relevant evidence to inform service development.