This article delineates a conceptual model for defining and measuring quality in prenatal services. It addresses three issues related to women's health: (a) the emerging interest in reproductive health as a concept that encompasses the full range of women's needs, versus the more narrow concept and approach of traditional maternal and child health services; (b) the importance of prenatal services within the context of reproductive health, particularly in developing countries; and (c) the positive role that quality plays in promoting women's health. It then proposes a model for defining and measuring quality in prenatal services, styled after Donabedian's work and informed by Bruce's framework. It assesses the quality of prenatal care in terms of five elements: management, pregnant woman-provider relations, technical competence, information transmission, and continuity of care. The framework was tested in the city of Irbid, Jordan, in 1992. Findings are summarized, and recommendations for future work as discussed.