Author Contributions: Drs Sermondade, Fezeu, and Czernichow had full access to all data in the study and take responsibility for the integrity of the data and the accuracy of the data analyses. Drs Lévy and Czernichow contributed equally to the manuscript. Study concept and design: Sermondade, Lévy, and Czernichow. Acquisition of data: Sermondade. Analysis and interpretation of data: Sermondade, Faure, Fezeu, Lévy, and Czernichow. Drafting of the manuscript: Sermondade and Czernichow. Critical revision of the manuscript for important intellectual content: Sermondade, Faure, Fezeu, and Czernichow. Statistical analysis: Fezeu and Czernichow. Administrative, technical, and material support: Sermondade, Faure, and Lévy. Study supervision: Lévy and Czernichow.
The Obesity-Fertility Collaborative Group: Nathalie Sermondade, MD, MSc, Céline Faure, PhD, Léopold Fezeu, MD, PhD, and Rachel Lévy, MD, PhD (Hôpital Jean Verdier, Bondy, France & Université Paris 13, Bobigny, France); Sébastien Czernichow, MD, PhD (Ambroise Paré Hospital & University of Versailles Saint Quentin en Yvelines, Boulogne-Billancourt, France, and INSERM, U1018, Centre for Research in Epidemiology and Population Health, Villejuif, France); Tina Kold Jensen, MD, PhD (Rigshospitalet, Copenhagen, Denmark); Madelon Van Wely, PhD (Academic Medical Centre, Amsterdam, the Netherlands); Jia Cao, PhD (Third Military Medical University, Chongqing, China); Ana Carolina Martini, PhD (Universidad Nacional de Córdoba, Córdoba, Argentina); Jorge Chavarro, MD, PhD (Brigham and Women's Hospital & Harvard Medical School, Boston, Massachusetts); Sandor Koloszar, MD, PhD (University of Szeged, Szeged, Hungary); Cecilia H. Ramlau-Hansen, MHSc, PhD (Aarhus University, Aarhus C, Denmark); Régine P. M. Steegers-Theunissen, MD, PhD (Erasmus University Medical Center, Rotterdam, the Netherlands); Branko Zorn, MD, PhD (University Medical Center, Ljubljana, Slovenia); Alex J. Polotsky, MD, MSc (University of Colorado Denver, Aurora); Brenda Eskenazi, PhD (UC Berkeley School of Public Health, Berkeley, California); Elin V. Magnusdottir, MSc (University of Iceland, Reykjavik); Imre Fejes, MD, PhD (University of Szeged, Szeged, Hungary); and Serge Hercberg, MD, PhD (Hôpital Avicenne, Bobigny, France & Université Paris 13, Bobigny).
Financial Disclosure: None reported.
Funding/Support: Dr Chavarro was supported in part by National Institute of Diabetes and Digestive and Kidney Diseases grant 5P30DK046200-19 and Dr Eskenazi was supported in part by National Institutes of Health grant P42ES04705.
Additional Contributions: The following individuals or departments performed the data collection in each of their centers: Niels Jorgensen, Rigshospitalet, Copenhagen, Denmark; Yafei Li, Third Military Medical University, Chongqing, China; Zhihong Cui, Third Military Medical University, Chongqing, China; Rosa Molina, Laboratorio de Andrologia y Reproduccion, Córdoba, Argentina; Ruben Daniel Ruiz, Facultad de Ciencias Medicas, Universidad Nacional de Córdoba, Córdoba, Argentina; Thomas L. Toth, Harvard Medical School, Boston, Massachusetts; Russ Hauser, Harvard School of Public Health, Boston; Janos Szollosi, University of Szeged, Szeged, Hungary; Ane Marie Thulstrup, Aarhus University Hospital, Aarhus, Denmark; Joop Laven, Marijana Vujkovic, and Fatima Hammiche, Erasmus University Medical Center, Rotterdam, the Netherlands; Gregor Majdic, Center for Animal Genomics, Veterinary Faculty, University of Ljubljana, Ljubljana, Slovenia; Rosana Hernandez Weldon, UC Berkeley School of Public Health, Berkeley, California; Andrew J. Wyrobek, Lawrence Berkeley National Laboratory, Berkeley; Department of Assisted Reproduction, Landspitali University Hospital, Landspitali, Iceland; and Zoltan Zavaczki, Landstinget Gavleborg, Hudiksvall, Sweden.