Anemia, Iron & Blood Health
Von Willebrand Disease in Women: Heavy Periods, Diagnosis and Pregnancy
Von Willebrand disease (VWD) is the most common inherited bleeding disorder. It happens when your blood doesn't have enough working von Willebrand factor, a protein that helps blood clot. In women it most often shows up as heavy periods, and many go years without a diagnosis because everyone, including them, assumed heavy bleeding was normal.
"My periods have always been like this"
That sentence is the heart of why VWD gets missed. If you've soaked through overnight pads since you were 13, doubled up with a tampon and a pad, set alarms to change protection at night, or planned your life around the first two days of your period, that isn't just "a heavy flow." And if your mother or sister bled the same way, that's not reassurance. It's a clue.
Symptoms in women
- Heavy menstrual bleeding, often since your first period. CDC research has found it's the most common bleeding symptom in women with VWD.
- Periods lasting longer than 7 days
- Iron deficiency or anemia (see heavy periods and anemia)
- Frequent or long nosebleeds
- Easy bruising, sometimes with lumps
- Gums that bleed after brushing or flossing
- Heavy bleeding after dental work, surgery or childbirth
- Painful bleeding from ovarian cysts at ovulation
A family history of bleeding problems, or of relatives with heavy periods, matters a lot.
What VWD actually is
When you're cut, platelets rush to the spot and clump into a plug. Von Willebrand factor works like glue that helps them stick. It also protects factor VIII, another clotting protein. If the factor is low or doesn't work right, bleeding lasts longer.
The CDC estimates VWD affects up to 1% of the U.S. population. Men and women inherit it equally, but women are more likely to have symptoms because of periods and childbirth.
| Type | What it means | How common |
|---|---|---|
| Type 1 | Lower than normal amount of von Willebrand factor | Most common; usually mild to moderate |
| Type 2 | Factor is present but does not work properly; several subtypes | Less common |
| Type 3 | Very little or no von Willebrand factor | Rare; usually severe |
Why it's so often missed
- Heavy periods get treated as normal, especially when other women in the family have them too.
- Symptoms can be mild.
- Von Willebrand factor levels rise with stress, exercise, pregnancy, estrogen-containing birth control and illness, so a test can look normal on the wrong day.
- People with blood type O naturally have lower levels, which complicates reading the results.
CDC survey data have found women often wait many years between their first bleeding symptoms and a diagnosis.
Should you be tested?
ACOG recommends that teens with heavy menstrual bleeding be evaluated for a bleeding disorder. Testing is also worth raising if you:
- Have had heavy periods since your first period
- Bled heavily after childbirth, surgery or dental work
- Have iron deficiency from heavy periods with no other clear cause
- Have a relative with a bleeding disorder
- Are considering a hysterectomy or ablation for heavy bleeding (ask before the procedure, not after)
What testing involves
It usually starts with questions about your bleeding history, sometimes using a standardized bleeding questionnaire. Blood tests include:
- CBC and platelet count
- PT and PTT (basic clotting tests, which can be normal in VWD)
- Von Willebrand factor antigen (how much factor you have)
- Von Willebrand factor activity (how well it works)
- Factor VIII activity
- More tests to find the type
Because levels bounce around, tests are often repeated, so one normal result doesn't close the case. Your clinician may time testing around your cycle or ask about birth control. Specialized testing is usually done by a hematologist.
Before you go, write down your bleeding history: how many pads or tampons on your heaviest day, whether you bleed through at night, any big bleeds after procedures or birth, and who in the family has similar issues.
How it's treated
Treatment depends on the type, how severe it is, and the situation.
For heavy periods
- Hormonal therapy, such as combined birth control pills or a hormonal IUD
- Tranexamic acid, a non-hormonal medicine taken during your period that helps stabilize clots
- Iron replacement for iron deficiency
The 2021 international VWD guidelines suggest hormonal therapy or tranexamic acid for heavy menstrual bleeding in women with VWD.
For bleeding episodes, surgery or dental work
- Desmopressin (DDAVP), which releases stored von Willebrand factor; it works for many people with type 1
- Von Willebrand factor concentrates, given by IV, for more severe types or major procedures
- Tranexamic acid, often alongside other treatments
Your hematologist will tell you which treatments fit you. Avoid aspirin and NSAIDs unless your clinician says they're okay, since they can increase bleeding.
VWD and pregnancy
Most people with VWD have healthy pregnancies. Von Willebrand factor naturally rises during pregnancy, which helps many people with type 1. After delivery, levels drop fast, so bleeding risk can be highest in the days and weeks after birth.
Planning usually includes:
- A pre-pregnancy or early pregnancy visit with a hematologist
- Checking levels in the third trimester
- A delivery plan shared with your OB, anesthesiologist and hospital
- Planning for epidural safety
- Close monitoring for postpartum bleeding
A maternal-fetal medicine specialist may be part of your team. VWD is inherited, so ask about your baby's risk too.
Day-to-day checklist
- Carry your diagnosis: a wallet card or medical ID, plus your hematologist's number.
- Tell every clinician, including dentists, before any procedure. Many need a bleeding plan.
- Check medicines first. Aspirin, ibuprofen, naproxen and some supplements can increase bleeding.
- Track your periods so you can see whether treatment is working.
- Get iron checked regularly if your periods are heavy.
- Plan pregnancy ahead with your OB/GYN and hematologist.
- Tell your family. Relatives may have VWD and not know it.
When to see a doctor
See a gynecologist or OB/GYN if you have heavy periods, especially with easy bruising, nosebleeds or a family history of bleeding. Get urgent care for bleeding that won't stop, soaking a pad every hour with dizziness, or heavy bleeding after childbirth. Browse gynecologists in Brooklyn or search for a gynecologist near you.
Seeing a hematologist in New York
VWD is diagnosed and managed by hematologists, ideally working with your gynecologist. Hemophilia treatment centers at major academic hospitals also care for people with bleeding disorders. Premier Hematology & Oncology, which sponsors our professional resources, offers hematology consults at centers across NYC, Long Island and the Hudson Valley. Clinicians can find referral details on our hematology partners page.
Frequently asked questions
What are the symptoms of von Willebrand disease in women?
Heavy menstrual bleeding is the most common symptom. Others include frequent or long nosebleeds, easy bruising, bleeding gums, and heavy bleeding after dental work, surgery or childbirth.
How common is von Willebrand disease?
The CDC estimates it affects up to 1% of the U.S. population, but many people with mild forms are never diagnosed.
Can you have a baby if you have von Willebrand disease?
Yes. Most people with VWD have healthy pregnancies, but planning with an OB/GYN and hematologist is important to reduce bleeding risk at delivery and after birth.
Why do I need to repeat my von Willebrand test?
Von Willebrand factor levels can rise with stress, exercise, pregnancy, estrogen and inflammation, which can hide the condition. Testing often needs to be repeated for an accurate result.
Sources
- ASH ISTH NHF WFH — 2021 Guidelines on the Diagnosis of von Willebrand Disease
- ASH ISTH NHF WFH — 2021 Guidelines on the Management of von Willebrand Disease
- CDC — Von Willebrand Disease
- ACOG — Committee Opinion 785: Screening and Management of Bleeding Disorders in Adolescents With Heavy Menstrual Bleeding
- NHLBI — Von Willebrand Disease
This article is for general education and is not medical advice. It does not replace an evaluation by a licensed clinician who knows your history. If you think you have a medical emergency, call 911.