Baby Fae body began generating isohaemagglutinins, but a suitable donor could not be found in time. Prior to the procedure, no infant heart transplant—even with human hearts—had been successfully performed due to a lack of infant human hearts. To address this issue, Bailey had become a pioneer in the research of cross-species heart transplants, which had included "more than 150 transplants in sheep, goats, and baboons". Multiple surgeons had previously experimented with baboon heart implants, leading some to speculate even that baboons could be farmed in the future for such purposes. When asked why he had picked a baboon over a primate
A Change of Heart (How I Met Your Mother) A Change of Heart (How I Met Your Mother) "A Change of Heart" is the 18th episode of the sixth season of the CBS sitcom "How I Met Your Mother" and the 130th episode overall. It originally aired on February 28, 2011. After Nora announces her intention to marry and settle down, Barney is worried; meanwhile, Robin's new boyfriend displays idiosyncrasies that remind her friends of a dog. The episode received a fairly positive reception, with 9.24 million watching the episode when it first aired. Some critics found elements of the plot cheesy, although the plot twist and character interactions