Relatives of deceased organ donors mourn for them at a ceremony unveiling a monument for the organ donors in April in Chongqing, China. Feature China/ Barcroft Media/Barcroft Media/Landov hide caption

Now Dr. Majilla Doyle's organ donors come to her. Robert J. Boston/Washington University School Of Medicine hide caption

Does it matter where it comes from if it helps you out? iStockphoto.com hide caption

A surgical team with Sahlgrenska University Hospital in Gothenburg, Sweden, performs the first mother-to-daughter uterine transplant. Johan Wingborg/University of Gothenburg hide caption

Amber Cooper lives in Modesto, Calif., with her 5-year-old son, Jaden, and her husband, Kevin. She had a liver transplant when she was 10 years old and has to take anti-rejection medication. Deanne Fitzmaurice for NPR hide caption

All in the family: Nino Giarratano (left), the head baseball coach at the University of San Francisco, joins hands with his father, Mickey Giarratano, after the transplant of a kidney from son to father at Porter Adventist Hospital in Denver last year. AP/Courtesy Giarratano Family hide caption