Sex differences in newborn attention found before postnatal experience
A study published in Biology of Sex Differences tested 130 newborn infants hours after birth and found that female infants spent a greater proportion of time looking at a human face (social stimulus), while male infants spent more time looking at a Newton's cradle (non-social object). Researchers at the University of Cambridge found that despite all infants generally preferring the social stimulus, this on-average sex difference likely reflects prenatal biological factors such as hormone levels and genetics, occurring before significant postnatal experience.
