Some of the clinical and theoretical issues thought to be involved in the psychology of "replacement children" are discussed. A developmental framework is proposed within which to view such children. The replacement child is becoming an identifiable clinical syndrome, and a developmental framework is sorely needed to encourage more systematic research. A replacement child perceives his status differently on both a cognitive and emotional level within the context of each developmental phase, and the affective and associative links need to be reworked each time. We view the status of being a replacement child as a developmental interference insofar as demands are placed on the child's immature ego which he might not yet be equipped to cope with.