Birth order and left-handedness revisited: some recent findings in chimpanzees ( Pan troglodytes) and their implications for developmental and evolutionary models of human handedness

This paper examines the relationship between parity, pregnancy outcome, and handedness in a sample of captive chimpanzees ( Pan troglodytes). The relation between parity, maternal age and positive or negative pregnancy outcome was assessed from life history data for 536 chimpanzees housed at the Yer...

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