So how did these mama cats start lion about their sex? According to Luke Hunter, president of the global wild cat conservation organization Panthera, these females most likely have a high level of testosterone. Their testosterone may be increased because of aberrant sperm that gave female embryos some male characteristics, or because their mothers may have had high testosterone levels that increased their exposure to the hormones in the womb, he told New Scientist. Alternatively, the lionesses could be experiencing testosterone-induced hairiness simply because they are maturing, kind of like your grandmother who is beginning to grow a fuzzy chin. In either case, the testosterone would probably render these females infertile, according to Kathleen Alexander, a biologist at Virginia Tech in Blacksburg.