University of Cambridge Jan 7 2025 Sex differences in brain structure are present from birth, research from the Autism Research Centre at the University of Cambridge has shown. While male brains tended to be greater in volume than female brains, when adjusted for total brain volume, female infants on average had significantly more grey matter, while male infants on average had significantly more white matter in their brains. Grey matter is made up of neuron cell bodies and dendrites and is