The Maternal and Child Health (MCH) Services Block Grant (Title V of the Social Security Act) has operated as a federal-state partnership since the Social Security Act was passed in 1935. Through Title V, the federal government pledged its support of state efforts to extend health and welfare services for mothers and children. Title V has been frequently amended in ensuing years to reflect changing national approaches to maternal and child health and welfare issues. This booklet provides an overview of Title V for those new to the Block Grant program and a compact guide for those familiar with Title V programs. For each portion of the law, a short synopsis is provided and relevant criteria explained. In addition, citations for the pertinent sections of Title V are included so that those interested in more detailed information can refer to the Title itself. (EV)