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
Baboon Woman Saks has rescued, fostered and rehabilitated individual orphaned and injured vervet monkeys and chacma baboons. Most of the primates in her care have been orphaned after their mothers were shot by humans. When Karin receives an ill baby baboon to foster, his potential future to be returned into the wild is followed, resulting in him interacting with two wild troops. One of these troops naturally starts to accept him when he begins to interact with individuals who visit the land where Karin, her partner and a number of rescued non-human primates reside. The documentary focuses on Karin's work with baboons;