Family members ages 18 to 65 are often considered first as potential donors. To begin, the family member takes a blood test to see if they are a good DNA match. If they are a good match, they are tested to see if they are healthy enough to have the procedure. Many patients don’t have a suitable family member and instead depend on donors from around the world who are listed in a donor registry. Donors who want to join a registry give a DNA sample via a swab. The DNA is analyzed and the information is added to the Be The Match Registry. Donors in the registry are between 18 and 40 years of age and in good health. Find the full list of medical guidelines to become a donor in the registry. More than 70% of patients who need a stem cell transplant don’t have a family member who qualifies for donation. They depend on people like you. Many resources are available to help you decide whether to donate. Becoming a donor takes commitment as it requires several hours to safely harvest stem cells, as multiple appointments during the four to six weeks leading up to the donation. Not every member of the registry goes on to donate, but all donations are given with the hope of being a match for someone in need.