english: But even though we know that these differences occur, 66 percent of the brain research that begins in animals is done in either male animals or animals in whom the sex is not identified.
non_english: Ampak čeprav vemo, da se te razlike pojavljajo, je 66 odstotkov raziskav možganov, ki se začnejo na živalih, narejenih na živalih moškega spola ali na živalih nedoločenega spola.