What is a genogram?

A genogram is a clinical drawing of a family. You use standard symbols (squares, circles, lines) to show who is related to whom across at least three generations, plus the patterns that travel between them: illness, addiction, attachment, conflict, resilience. Therapists, family-medicine doctors, social workers, and researchers use genograms to make those patterns visible. Once you can see a pattern, you can name it, talk about it, and sometimes change it.

If you have only seen a family tree, a genogram will look familiar at first and then stranger as you read it. The shapes match. The intent does not.

A genogram vs. a family tree

A family tree records who descended from whom. A genogram records how a family works: who is close, who is cut off, who carries what, who repeats which patterns. Think of it as a map of a system rather than a list of ancestors.

A genogram includes things a family tree leaves out:

• Relationship quality between any two people: close, conflicted, fused, estranged, abusive, distant
• Health and behavioral history: heart disease, depression, addiction, suicide, autoimmune conditions, anything the family has carried
• Major life events that shaped the family: migration, war, miscarriage, deaths in childhood, secrets
• Roles and dynamics: the caretaker, the scapegoat, the lost child, the parentified child

Two families can have an identical tree and produce completely different genograms.

Why genograms matter

Genograms became a standard clinical tool through the work of Monica McGoldrick. Her 1985 book Genograms: Assessment and Intervention (now in its fourth edition with Randy Gerson and Sueli Petry) gave the field a shared vocabulary. Before McGoldrick, family therapists drew family diagrams using whatever symbols they invented in the moment. After McGoldrick, a genogram drawn in Boston could be read in Warsaw.

The insight that drove this work is older than the notation. Murray Bowen, working in the 1960s and 70s, argued that you could not understand a person's distress without understanding the family system they came from. Bowen called the way anxiety, depression, addiction, and physical illness travel through families the "multigenerational transmission process." McGoldrick gave it a way to draw.

The contemporary author whose work sits closest to the genogram tradition is Mark Wolynn. His book It Didn't Start With You argues that traumas which go unnamed in one generation often surface in the next as anxiety, illness, or self-defeating patterns that the affected person has no other way to explain. A genogram does not cure any of this. It makes the pattern visible, which is the first step in working with it.

Clinicians treat genograms as clinical instruments, not journaling exercises. They get useful when you know what you are looking at.

What you can see in a genogram

A complete genogram has three layers.

The structural layer is the simplest. Squares represent men, circles represent women, and a triangle marks an unknown gender or pregnancy. People connected by a horizontal line are partners. A vertical line drops from a couple to their children. An X through a shape means the person has died. You can read this much in five minutes, and it is what makes a genogram resemble a family tree.

The relational layer is where genograms become different. Single straight lines show neutral or undefined relationships, doubled lines show closeness, tripled lines show enmeshment, jagged lines show conflict, broken lines show distance or estrangement. A jagged-and-doubled combination (close and conflicted) describes the kind of relationship most adults will recognize from their own family. This layer shows how the family actually functions, not just who belongs to it.

The historical layer adds dates, events, and conditions. Birth and death years. Diagnoses and addictions written next to the relevant person. Major life events marked on the year they happened: emigration, war, divorce, the loss of a child. This is where transgenerational patterns surface. Three generations of women in one branch developing depression at the same age. Men on one side of the family repeating the same addiction. A family that lost a child in 1972 still reorganizing itself around the loss fifty years later.

You can add as many layers as the work calls for. A genogram for genetic counseling emphasizes medical history. A genogram in addiction treatment emphasizes substance use across generations. A genogram in couples therapy emphasizes relational quality. Choose the layer that matches your purpose.

How to read one

Reading a genogram is a skill you build by drawing your own. The basic move: pick an "index person" (the proband, conventionally the person whose family is being mapped) and trace outward. Parents above. Siblings horizontally. Children below. Then start asking the questions that make the diagram come alive: who in this family was close to whom, who was cut off, what each generation carried, what travelled forward, what stopped.

If you are new to this, the genogram symbols guide is the right place to start. It covers every shape and line in current use, including the variations between practitioners. Once you have the vocabulary, the step-by-step drawing guide walks through building your first genogram from scratch.

For a worked case, our three-generation example shows how a real-looking family resolves into a clear visual pattern, and which questions a clinician would ask while looking at it.

A note on emotional weight

If you are drawing a genogram of your own family, know what you are walking into. Genograms make the implicit explicit. The absent grandfather, the recurring depression, the daughter who left: these will appear on the page in front of you, and they will be hard to look at.

That is the point. But approach the work with care. For a school assignment or casual curiosity, keep it light. If you are trying to make sense of something that has been weighing on you, do it with a therapist or in a supportive context. These patterns benefit from being witnessed by someone else.

Our parent practice, FamRoots, is built around this kind of guided process.

Where to go from here

To learn the notation itself, start with the symbols guide and the McGoldrick notation reference. To start drawing right away, the how-to-draw guide will get you to your first genogram in about an hour, and the free blank template gives you the printable structure to fill in. If you are a clinician comparing tools for client work, the tools comparison page covers what is currently available, honestly.

A genogram is the most efficient way to draw a family system. Most families have more structure than the people in them realize. Seeing that structure is where the clinical work starts.