There is no consensus on the exact cause of Temple Grandin's autism. Some experts believe that it may have been caused by a combination of genetic and environmental factors. Genetic studies have shown that there may be a genetic component to autism, and it is known that Grandin's father had bipolar disorder, which can be associated with autism. Environmental factors that may have played a role include Grandin's premature birth and the use of forceps during delivery.
Regardless of the exact cause, Grandin's autism has undoubtedly shaped her life in many ways. It has given her a unique perspective on the world, and has motivated her to become a world-renowned expert on autism and animal behavior.