Integrating child development and child welfare knowledge -- Theoretical foundations -- Maltreatment of infants -- Foster care of infants -- Creating permanency for infants -- Developmental profile of infants in child welfare -- Assessing infants and families in child welfare -- Preventing maltreatment and the need for placement of infants -- Optimizing the substitute care of infants -- Facilitating transitions for infants in child welfare -- Promoting infant well-being -- Enhancing parent-infant relationships -- Infant-centered child welfare policy -- Infant-centered child welfare practice -- Conclusions, summary, and charge to the field.