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
Guinea baboon Guinea baboon The Guinea baboon ("Papio papio") is a baboon from the Old World monkey family. Some (older) classifications list only two species in the genus "Papio", this one and the hamadryas baboon. In those classifications, all other "Papio" species are considered subspecies of "P. papio" and the species is called the savanna baboon. The Guinea baboon inhabits a small area in western Africa. Its range includes Guinea, Senegal, Gambia, southern Mauritania and western Mali. Its habitat includes dry forests, gallery forests, and adjoining bush savannas or steppes. It has reddish-brown hair, a hairless, dark-violet or black face with the