World Thrombosis Day is on October 13
This World Thrombosis Day, prevent thrombosis. Protect your health!
Founded by the International Society on Thrombosis and Haemostasis (ISTH), World Thrombosis Day shines a light on thrombosis, a serious but often misunderstood or unknown condition that affects millions worldwide.
This year’s campaign puts the spotlight on women and thrombosis, examining how pregnancy, hormonal contraception, menopause and other life stages can raise the risk of blood clots in ways that are often overlooked or misdiagnosed.
By joining in, you can help spread awareness, protect lives and empower women everywhere to recognize their risk and advocate for their health.
Your voice matters. Your story matters. Together, we can turn awareness into action.
Discover HerClotStory. Be part of the movement for a safer, healthier future for women everywhere.

Introducing the ISTH Women’s Health Hub
The ISTH Women’s Health Hub is a new resource from the International Society on Thrombosis and Haemostasis, built to close the gap between what’s known about thrombosis in women and what patients and clinicians actually hear. It brings together patient guides, clinical research and policy resources covering every stage of a woman’s life, from puberty through menopause, and it will keep growing well beyond World Thrombosis Day.
Blood clot prevention:
Why it matters
Why it matters

VTE Risk Assessment
The campaign offers a timely opportunity to discuss, update or establish an organization’s VTE policy. While there is no universal policy on VTE prevention, several models do exist. Learn more.

ISTH Academy Thrombosis Resources
The ISTH Academy offers the latest resources and information on thrombosis and other bleeding conditions. These resources include abstracts, journal articles, recorded webinars, webcasts and more. Learn more.

Share Resources With Your Patients
Review campaign resources and provide them to recently diagnosed patients who are seeking guidance and support. View the resources.
Know Thrombosis
Healthcare professionals must recognize blood clot risks from head to toe in clinical settings, particularly venous thromboembolism (VTE) including deep vein thrombosis (DVT) and pulmonary embolism (PE). VTE risk assessments should be conducted across all medical specialties for every hospitalized patient, as key risk factors include prolonged immobility, surgery, cancer and certain medications.
Timely VTE risk assessment, prophylaxis and early detection are essential for preventing thrombotic events and reducing patient morbidity.
World Thrombosis Day, led by the International Society on Thrombosis and Haemostasis (ISTH), provides healthcare professionals with up-to-date scientific research, clinical guidelines and preventive strategies. ISTH is the leading thrombosis and hemostasis professional organization worldwide with more than 7,700 members in 100+ countries supporting evidence-based VTE prevention across all medical disciplines.
Feeling Empowered as a Patient is Life-Changing
Patient empowerment through health education puts you at the center of your healthcare and maximizes treatment benefits. Learning about your health condition helps you understand your treatment plan, long-term care options and healthcare costs while creating a more positive healthcare experience. This patient-focused platform provides tools and resources to take control of your health journey, make informed medical decisions and communicate effectively with your healthcare team about blood clot prevention and thrombosis treatment options.
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Make a Donation
The success of the World Thrombosis Day campaign hinges on the generosity of supporters like you. By making a financial contribution, you empower us to deliver top-notch education and resources every year. If you’re passionate about our cause and ready to make a difference, please click the link below to donate. Your support is invaluable in the fight against thrombosis.








