BETHESDA, Md., May 11 (UPI) -- Brain scans show women's brains appear to be hard-wired to respond to the cries of a hungry infant, but men's brains are not, U.S. researchers say.
Marc H. Bornstein, head of the Eunice Kennedy Shriver National Institute of Child Health and Human Development, part of the National Institutes of Health, and colleagues analyzed brain images from 18 adults, parents and non-parents, who were lying at rest as functional magnetic resonance imaging monitored their brain activity. The researchers played a recording of white noise interspersed with the sounds of an infant crying.