Structure and evolution of growth hormone and related proteins (M. Wallis). Regulation of rat growth hormone gene expression (A. Aranda et al) Transducing signals involved in stimulus-secretion coupling of growth hormone secretion. Role of G proteins (G. Schettini, E. Landolfi). Ionic currents in the regulation of stimulating/secretion coupling in somatotrophs (C. Chen, J.-M. Israel, J.-D. Vincent). Developmental regulation of somatostatin and growth hormone-releasing hormone gene expression (J. Argente, J.A. Chowen). Paracrine regulatory activity in the GRF-somatostatin-GH system (F. Sanchez- Franco et al). Neurotransmitter control of growth hormone secretion (E. Ghigo). Gonadal hormones and growth hormone secretion (E. Aguilar, M. Tena Sempere, L. Pinilla). Inter-relationships between growth hormone and glucose homeostasis (I.S. Ismail, B.M. Lewis, J.R. Peters, M.F. Scanlon). Thyroid hormone and growth hormone secretion (R. Valcavi, M. Zini). Role of glucocorticoids in the neuroregulation of GH secretion (C. Dieguez et al). GH secretion in obesity (A.M.J. Lengyel). Growth hormone-releasing hormone: Therapeutic aspects (R.J.M. Ross, J.M.W. Kirk, A.B. Grossman). Physiology of the insulin-like growth factor I and insulin-like growth factor II/mannose 6-phosphate receptors (B. Burguera et al). The dog as an animal model for studies on growth hormone neuroregulation (F.F. Casanueva et al). Roles of growth hormone, prolactin and placental lactogens in the regulation of maternal and fetal growth (C.S. Nicoll, M.H. Chiang). Role of neuropeptides on GH secretion and somatic growth in ruminants (L.F. De la Cruz, V. Rueda, M. Rico). Regulation of GH secretion and somatic growth in chickens (T.R. Hall). GH antibodies and somatic growth (A.T. Holder). Somatic growth in transgenic animals (A. Valera, F. Bosch). Methodological approaches to the study of neuropeptides (R.M. Se#aris et al). Index of authors.