Melissa Hines is Professor of Psychology in the Department of Social and Developmental Psychology at the University of Cambridge in the United Kingdom (UK). Her research interest is in gender development, and she is currently exploring how inborn predispositions to gender typicality, or atypicality, particularly those caused by gonadal hormones, interact with postnatal experiences to shape gender development. This interdisciplinary approach reflects her broad training and experience in social and developmental psychology, as well as neuroscience and clinical psychology. Ongoing projects include studies of gender identity, sexual orientation, and cognitive and emotional functioning in individuals with disorders of sex development (DSD: formerly called intersex conditions), as well as a longitudinal study that is following strongly sex-typical and sex-atypical children from a population sample of over 14,000 pregnancies and births. These projects have been funded by the United States Public Health Service and by the Wellcome Trust in the UK. Melissa is past president of the International Academy of Sex Research, a fellow of the Association for Psychological Science, and the author of Brain Gender, published in 2004 by Oxford University Press. Melissa also has authored over 100 scientific publications, and serves on the editorial boards of the journals, Hormones and Behavior, Archives of Sexual Behavior and Biology of Sex Differences. At Cambridge, she teaches a course on ‘Gender development: Biological, psychological and clinical perspectives’. In addition to her academic appointment in the Department of Social and Developmental Psychology at Cambridge, Melissa is a Fellow at Churchill College. Melissa was educated at Princeton University (BA) and at the University of California, Los Angeles (UCLA) (PhD), where she also undertook postdoctoral study in the Laboratory of Neuroendocrinology. She was Associate Professor in the Department of Psychiatry and Biobehavioral Sciences at UCLA, before moving to England in 1996, first to Goldmiths College, University of London, and then to City University, where she directed the Behavioural Neuroendocrinology Research Centre. She moved to Cambridge in 2006.