The International Committee Monitoring Assisted Reproductive Technologies (ICMART) is an independent international nonprofit organization that has taken a leading role in the development, collection, and dissemination of worldwide data on assisted reproductive technology (ART). Information on availability, efficacy, and safety is provided to health professionals, health authorities, and the public. The glossary facilitates dissemination of ART data through a set of agreed-upon definitions, as seen in the most recent World Report on ART. It provides a conceptual framework for further international terminology and data development of ART.