Résumé : In the article by Poppe et al. entitled “2021 European Thyroid Association Guideline on Thyroid Disorders prior to and during Assisted Reproduction” [Eur Thyroid J 2020;9:281–295, DOI: 10.1159/000512790], the fourth author’s name was misspelled and should correctly read Gesthimani Mintziori. The authorship is therefore as follows: Kris Poppea Peter Bisschopb Laura Fugazzolac Gesthimani Mintziorid David Unuanee Andrea Weghoferf aEndocrine Unit, CHU Saint-Pierre, Université Libre de Bruxelles (ULB), Brussels, Belgium; bDepartment of Endocrinology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands; cDivision of Endocrine and Metabolic Diseases, IRCCS Istituto Aux ologico Italiano, and Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy; dUnit of Reproductive Endocrinology, First Department of Obstetrics and Gynaecology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece; eDepartment of Internal Medicine, Endocrine Unit, UZ Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium; fDepartment of Gynecological Endocrinology & Reproductive Medicine, Medical University of Vienna, Vienna, Austria.