The International Committee Monitoring Assisted Reproductive Technologies (ICMART) is an independent, international non-profit organization that has taken a leading role in the development, collection and dissemination of worldwide data on 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 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.