This study reviews the major research and interventions concerning readiness and quality of care in family planning programs. It has three aims: to identify and describe the principal methodological research including conceptual frameworks, perspectives, and tools for measuring and improving quality; to describe the results from various intervention studies; and to assess what is known about the effect of such interventions. The review suggests that interventions that improve client-provider interactions show the greatest promise. Good quality of care results in such positive outcomes as clients' satisfaction, increased knowledge, and more effective and longer use of contraceptives. Rigorously documented evidence of the effects of interventions is sorely needed. The review indicates areas requiring additional research.