. >> reporter: so doreen flinn has become the lead plaintiff in a landmark case to change that law. >> bone marrow is just like anything else in the world. it's valuable and if you compensate people for it, you're going to get more of it. it's just that simple. >> reporter: doreen's need for bone marrow is particularly dire. years ago doctors told her the best chance for jordan was a transplant from a sibling donor, so doreen and her then husband turned to invitro fertilization to conceive a healthy child who could be that match, but in a cruel twist of fate twins georgia and julia now 7 were born with the same deadly disease as their sister. >> i was so upset. i blamed myself. >> reporter: why? >> we chose to bring them into the world and all i did was bring in two more sick kids. >> reporter: according to the world's largest bone marrow registry there is no shortage of people willing to donate for free. >> we have 9.5 million people on the u.s. registry willing to be that match for that patient, so we are not in a situation where we need to ask somebody to go the extra mile by payin