In the United States, the term child welfare is used to describe a set of government services designed to protect children and encourage family stability. These typically include investigation of alleged child abuse and neglect ("child protective services"); foster care; adoption services; and services aimed at supporting at-risk families so they can remain intact ("prevention services" or "family preservation services"). Though the Federal government sets rules which all States must follow and provides significant funding, it is the fifty states that have primary responsibility for establishing and operating child welfare systems.