Similar earlier stories: Fetus donates stem cells to heal mother's heart: http://www.newscientist.com/article/dn21185-fetus-donates-stem-cells-to-heal-mothers-

Similar earlier stories: Fetus donates stem cells to heal mother's heart: http://www.newscientist.com/article/dn21185-fetus-donates-stem-cells-to-heal-mothers-heart.html http://www.newscientist.com/article/dn21185-fetus-donates-st... Baby/mother cell exchange: http://kottke.org/12/01/babymother-cell-exchange http://kottke.org/12/01/babymother-cell-exchange