Patterns of professional involvement and control in self-help groups were studied through a questionnaire completed by representatives of 63 self-help groups for parents of high-risk newborns located throughout the United States. Results indicated that when professionals began a group, they were likely to continue to maintain control over it. Groups controlled by professionals were more likely to utilize professional counseling as a form of support and less likely to provide outreach services to parents following hospital discharge of their infants. Group stability, growth, and innovation were associated with more consultation between parents and professionals in the planning process.