A genogram is a type of family tree that is illustrated with information like physical and psychological histories, as well as the emotional history of members of the family tree. The advantage of a genogram is that it can more easily display patterns of heredity.
A number of specific symbols were developed for a genogram, which is also referred to as a McGoldrick-Gerson study, a Family Diagram or a Lapidus Schematic. For example, squares represent males in the family tree, while circles represent females. Crossed-out shapes indicated deceased family members. Triangles indicate pregnancies not yet come to term; when crossed-out, it indicates an unborn fetus or miscarriage. The colors and types of lines connecting members of a genogram indicate types and emotional content of relationships.