Twin Research Registry at SRI International | SRI International

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Twin Research Registry at SRI International

Are you a TWIN? You may be eligible to participate in research to help scientists advance new treatments for diseases and explain the roles of genetics and the environment in health and behavior. Learn about our current studies.

  • This registration form is for adults only (18+ years old). Parents of twins aged 17 and under may register their children by calling 1-800-SRI-TWIN (1-800-774-8946). Adults may also use this number to register over the phone.
  • You will receive regular updates from SRI International's Center for Health Sciences describing opportunities to participate in health research, but you are under no obligation to enroll in these studies.
  • The information you provide will remain confidential.
  • NOTE:  please only click the submit button once.  Please be assured that your form was submitted.  You will hear from us soon.  If you do not, please contact twin [at] 

Please indicate your gender and your twin's gender by clicking the responses below:
Please give us your name, address, telephone number(s), and email address:
Please provide your twin's name, current address, telephone number(s), and email address:
i.e., search engine, online radio, other
which newspaper?
which station?
Learn more about our current research studies.

By clicking the 'submit' button below, you voluntarily consent to register with the Twin Research Registry at SRI International. By registering, you become eligible to participate in future twin research studies. You agree that you may be contacted by researchers about the possibility of participating in studies, but you will be under no obligation to participate in any study. All information gathered from this registration form will be held in confidence. You can remove your name from the registry at any time by contacting us at 1-800-SRI-TWIN (1-800-774-8946), or by post at Twin Research Registry at SRI International, 333 Ravenswood Avenue, Menlo Park, California 94025, or via e-mail at: twin [at]