The International Glossary on Infertility and Fertility Care, 2017
Ian Cooke, G David Adamson, Jacques de Mouzon, Silke Dyer, Catherine Racowsky, Laura Rienzi, Lone Schmidt, Joe Leigh Simpson, Sheryl van der Poel, Fernando Zegers-Hochschild, Rebecca Z. Sokol, Arne Sunde
Can a consensus and evidence-driven set of terms and definitions be generated to be used globally in order to ensure consistency when reporting on infertility issues and fertility care interventions, as well as to harmonize communication among the medical and scientific communities, policy-makers, and lay public including individuals and couples experiencing fertility problems?
Summary Answer
A set of 283 consensus-based and evidence-driven terminologies used in infertility and fertility care has been generated through an inclusive consensus-based process with multiple stakeholders.
What Is Known Already
In 2006 the International Committee for Monitoring Assisted Reproductive Technologies (ICMART) published a first glossary of 53 terms and definitions. In 2009 ICMART together with WHO published a revised version expanded to 87 terms, which defined infertility as a disease of the reproductive system, and increased standardization of fertility treatment terminology. Since 2009, limitations were identified in several areas and enhancements were suggested for the glossary, especially concerning male factor, demography, epidemiology and public health issues.
Study Design, Size, Duration
Twenty-five professionals, from all parts of the world and representing their expertise in a variety of sub-specialties, were organized into five working groups: clinical definitions; outcome measurements; embryology laboratory; clinical and laboratory andrology; and epidemiology and public health. Assessment for revisions, as well as expansion on topics not covered by the previous glossary, were undertaken. A larger group of independent experts and representatives from collaborating organizations further discussed and assisted in refining all terms and definitions.
Participants/Materials, Setting, Methods
Members of the working groups and glossary co-ordinators interacted through electronic mail and face-to-face in international/regional conferences. Two formal meetings were held in Geneva, Switzerland, with a final consensus meeting including independent experts as well as observers and representatives of international/regional scientific and patient organizations.
MAIN RESULTS AND THE ROLE OF CHANCE: A consensus-based and evidence-driven set of 283 terminologies used in infertility and fertility care was generated to harmonize communication among health professionals and scientists as well as the lay public, patients and policy makers. Definitions such as 'fertility care' and 'fertility awareness' together with terminologies used in embryology and andrology have been introduced in the glossary for the first time. Furthermore, the definition of 'infertility' has been expanded in order to cover a wider spectrum of conditions affecting the capacity of individuals and couples to reproduce. The definition of infertility remains as a disease characterized by the failure to establish a clinical pregnancy; however, it also acknowledges that the failure to become pregnant does not always result from a disease, and therefore introduces the concept of an impairment of function which can lead to a disability. Additionally, subfertility is now redundant, being replaced by the term infertility so as to standardize the definition and avoid confusion.
Limitations, Reasons for Caution
All stakeholders agreed to the vast majority of terminologies included in this glossary. In cases where disagreements were not resolved, the final decision was reached after a vote, defined before the meeting as consensus if passed with 75%. Over the following months, an external expert group, which included representatives from non-governmental organizations, reviewed and provided final feedback on the glossary.
Wider Implications of the Findings
Some terminologies have different definitions, depending on the area of medicine, for example demographic or clinical as well as geographic differences. These differences were taken into account and this glossary represents a multinational effort to harmonize terminologies that should be used worldwide.
Zegers-Hochschild Adamson Dyer international glossary infertility fertility care 2017, ICMART WHO ESHRE ASRM FIGO consensus terminology reproductive medicine definitions, infertility definition 12 months unprotected intercourse inability conceive, ART IVF ICSI terminology standardized definitions international consensus glossary, Human Reproduction 2017 international glossary 283 terms fertility care definitions, subfertility fecundity infertility clinical pregnancy live birth standard definitions, ovarian reserve diminished response poor responder standardized terminology, surrogacy donor gametes fertility preservation cryopreservation defined terms, reproductive medicine terminology harmonization global communication consensus, assisted reproduction outcome reporting standardized definitions glossary revision
PMID 29117321 29117321 DOI 10.1093/humrep/dex234 10.1093/humrep/dex234
Cite this article
Zegers-Hochschild, F., Adamson, G. D., Dyer, S., Racowsky, C., de Mouzon, J., Sokol, R., Rienzi, L., Sunde, A., Schmidt, L., Cooke, I. D., Simpson, J. L., & van der Poel, S. (2017). The International Glossary on Infertility and Fertility Care, 2017. *Human reproduction (Oxford, England)*, *32*(9), 1786-1801. https://doi.org/10.1093/humrep/dex234
Zegers-Hochschild F, Adamson GD, Dyer S, Racowsky C, de Mouzon J, Sokol R, et al. The International Glossary on Infertility and Fertility Care, 2017. Hum Reprod. 2017;32(9):1786-1801. doi:10.1093/humrep/dex234
Zegers-Hochschild, F., et al. "The International Glossary on Infertility and Fertility Care, 2017." *Human reproduction (Oxford, England)*, vol. 32, no. 9, 2017, pp. 1786-1801.
Mørch NF et al., 2026Human reproduction (Oxford, England)
STUDY QUESTION: Are maternal concentrations of pregnancy-associated plasma protein-A (PAPP-A) and insulin-like growth factor-1 (IGF-1) influenced by the frozen embryo transfer (FET) protocol in early ...
Davis CP et al., 2025Human Reproduction (Oxford, England)
STUDY Question: Are dietary patterns associated with age at menarche after accounting for BMI-for-age (BMIz) and height?
SUMMARY ANSWER: We observed associations between both the Alternative Healthy ...
Chung HF et al., 2025
Open Access
Human Reproduction (Oxford, England)
STUDY Question: What is the association between endometriosis and the type and age of menopause?
SUMMARY ANSWER: Women with endometriosis had a 7-fold increased risk of undergoing surgical menopause ...
Kiser AC et al., 2024
Open Access
Human Reproduction (Oxford, England)
STUDY Question: How do endometriosis diagnoses and subtypes reported in administrative health data compare with surgically confirmed disease?
SUMMARY ANSWER: For endometriosis diagnosis, we observed ...
Endometriosis > Diagnostics > Administrative Data ValidationResearch Methodology > Data Validation > Health RecordsDiagnostics > Disease Identification > Claims Data Accuracy