Part 1 Introduction: introduction to behavioural endocrinology, Jill B. Becker and S. Marc Breedlove; sexual differentiation of the brain and behaviour, S. Marc Breedlove. Part 2 Hormonal influences on sexual behaviour: neuroendrocrinology of sexual behaviour in the female, C. Sue Carter; neuroendocrinology of sexual behaviour in the male, Michael J. Baum; hormonal influences on human sexual behaviour, C. Sue Carter; diversity of hormone-behaviour relations in reproductive behaviour, David Crews; hormonal influences on courtship behaviours, Darcy B. Kelly and Eliot Brenowitz. Part 3 Hormonal influences on nonsexual behaviours: hormone-behaviour relations in the regulation of parental behaviour, J.S. Rosenblatt; hormones and aggressive behaviour, Edward P. Monaghan and Stephen E. Glickman; neuroendocrinology of the stress-response, Robert M. Sapolsky; hormonal influences on extrapyramidal sensorimotor function and hippocampal plasticity, Jill B. Becker; sex differences and hormonal influences on cognitive function in humans, Elizabeth Hampson and Doreen Kimura. Part 4 The reciprocal regulation of hormones and behaviour: environmental factors influencing hormone secretion, Rae Silver; hormonal regulation of behaviour - insights from invertebrate systems, James W. Truman; hormones and ingestive behaviours, Edward M. Stricker and Joseph G. Verbalis; hormones and biological rhythms, Lawrence P. Morin and John Dark.