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About HOW

Welcome to the Health of Women (HOW) Study®, an international online study for breast cancer.

The goal of the HOW Study is to track many thousands of women (and men), with and without breast cancer, over time to learn what causes breast cancer and how to prevent it. HOW also studies long-term breast cancer survivors to better understand how they are beating the odds and to document changes to their quality of life caused by breast cancer and its treatments.

We believe that the HOW Study is the first to encourage participants to submit questions they want answered. This approach allows us to ask a boundless variety of questions, and we are eager to hear what you want us to consider!

Once you sign up to become a member of the HOW Study, you will receive periodic questionnaires that will ask questions about different health and environmental exposure topics. Each new questionnaire is released in a "Call to Action" email and addresses a specific topic, such as reproductive health, cancer history (for those with breast cancer), environmental exposures, and much, much more. Questionnaires can take 60 to 90 minutes to complete, but they do not have to be completed in one sitting. To sign up, click the JOIN HOW button at the top of the page!