In this book, the authors present new research in the study of neonatal care. Topics discussed include the effects of maternal stress and intrauterine environmental factors on fetal behavior and central brain processes related to cognition, memory and habituation; phosphodieterases and their inhibitors in some respiratory system disorders; glucocorticoids in meconium aspiration syndrome and the possible benefits versus the risks of treatment; and the evidence linking hyperbilirubinemia to auditory neuropathy and prelingual deafness.