How Is Von Willebrand Disease Inherited?

If you have Von Willebrand disease (VWD), you will not definitely pass the condition to your children. Whether your children inherit the disease—and how severe it might be—depends entirely on the specific type of VWD you have and the genetics of your partner ^[1]. Von Willebrand disease is an inherited genetic condition passed down through families, but it follows two completely different inheritance patterns known as autosomal dominant and autosomal recessive ^[1].

Because VWD has several different subtypes, the chances of passing it on typically range from 0% (if you have a recessive type and your partner is not a carrier) to 50%, assuming your partner does not also have VWD or carry the gene ^[2]. If a child does inherit VWD, it is important to remember that highly effective treatments are available to manage symptoms, allowing them to live a normal, active life.

Understanding your specific type is the first step in family planning.

Autosomal Dominant VWD (Types 1, 2A, 2B, 2M)

Most cases of Von Willebrand disease—including Type 1 and several subtypes of Type 2 (2A, 2B, and 2M)—follow an autosomal dominant pattern ^[1].

Autosomal dominant means that a child only needs to inherit one copy of the mutated gene from one parent to inherit the condition. If you have one of these dominant types, you have one mutated VWD gene and one normal VWD gene.

Assuming your partner does not have VWD, your chances of passing it on are:

• A 50% chance that each child will inherit the gene ^[2].
• A 50% chance that each child will inherit your normal gene and will not have the condition ^[2].

It is important to know that even if your child inherits the gene, they might never experience noticeable bleeding symptoms. In genetics, this is called “incomplete penetrance” or variable expression. Type 1, for example, often has very mild symptoms that vary widely even within the same family ^[3][4].

Autosomal Recessive VWD (Types 2N and 3)

Type 3 and Type 2N of Von Willebrand disease follow an autosomal recessive pattern ^[1]. Type 3 is the most severe form of VWD, causing very low or non-existent levels of Von Willebrand factor ^[3]. Type 2N often causes a drop in factor VIII (another blood-clotting protein), mimicking a different bleeding disorder called Hemophilia A. This happens because Von Willebrand factor normally acts as a carrier protein that protects factor VIII in the bloodstream ^[5].

Autosomal recessive means that a child must inherit two copies of the mutated gene—one from both the mother and the father—to develop the clinical disease. A person with just one mutated gene is called a carrier. Carriers do not have clinical VWD and typically do not require treatment; while they might bruise slightly easier than average, they are generally considered healthy and unaffected, but they can pass the gene to their children.

If you have an autosomal recessive type (meaning you have two copies of the mutated gene):

• If your partner is NOT a carrier: All of your children will inherit one mutated gene from you. They will be carriers, but they will not have the clinical disease themselves.
• If your partner IS a carrier: There is a 50% chance your child will have the active disease, and a 50% chance they will be a carrier ^[2].

If you and your partner are both carriers of a recessive VWD gene (but neither of you has the active disease):

• 25% chance of having a child with the disease ^[2].
• 50% chance of having a child who is a carrier (like you) ^[2].
• 25% chance of having a child who is neither a carrier nor affected ^[2].

The Role of Genetic Counseling

Because the subtypes of VWD can be complex, and standard laboratory blood tests do not always perfectly predict bleeding risks, genetic counseling is highly recommended for anyone with VWD who is planning to have children ^[6][4]. You can start this process by asking your hematologist or obstetrician/gynecologist (OBGYN) for a referral to a genetic counselor.

A genetic counselor can:

• Confirm your exact subtype: Molecular genetic testing is increasingly used to pinpoint the exact mutation causing your VWD, distinguishing between subtypes (like 2B and 2N) that require different management strategies ^[7].
• Test your partner: This is especially important if you have an autosomal recessive type, to determine if your partner is a carrier ^[8].
• Discuss pregnancy risks: Genetic counselors and specialized hematologists will help you prepare for pregnancy and childbirth. Managing VWD during pregnancy requires specific care to lower the risk of heavy bleeding after delivery (postpartum hemorrhage) ^[9][10]. Please do not let this risk frighten you: doctors have highly effective treatment protocols, factor concentrates, and medications to keep you and your baby safe during and after delivery.