About the Authors

Shilpi Agrawala

Contributed equally to this work with: Shilpi Agrawala, Lindsey A. Sjaarda

Roles Data curation, Formal analysis, Writing – original draft, Writing – review & editing

Affiliations University of Texas Southwestern Medical Center, Dallas, TX, United States of America, Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America

Lindsey A. Sjaarda

Contributed equally to this work with: Shilpi Agrawala, Lindsey A. Sjaarda

Roles Conceptualization, Formal analysis, Investigation, Methodology, Project administration, Supervision, Validation, Writing – original draft, Writing – review & editing

Affiliation Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America

Ukpebo R. Omosigho

Roles Data curation, Formal analysis, Writing – original draft, Writing – review & editing

Affiliation Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America

Neil J. Perkins

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Supervision, Validation, Writing – original draft, Writing – review & editing

Affiliation Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America

Robert M. Silver

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Supervision, Validation, Writing – original draft, Writing – review & editing

Affiliation Department of Obstetrics and Gynecology, University of Utah and Intermountain Healthcare, Salt Lake City, UT, United States of America

Sunni L. Mumford

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Supervision, Validation, Writing – original draft, Writing – review & editing

Affiliation Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America

Matthew T. Connell

Roles Data curation, Formal analysis, Writing – original draft, Writing – review & editing

Affiliations Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America, Program of Reproductive and Adult Endocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America

Ashley I. Naimi

Roles Data curation, Formal analysis, Writing – original draft, Writing – review & editing

Affiliation Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, United States of America

Lisa M. Halvorson

Roles Data curation, Formal analysis, Writing – original draft, Writing – review & editing

Affiliation Gynecologic Health and Disease Branch, Division of Extramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America

Enrique F. Schisterman

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Supervision, Validation, Writing – original draft, Writing – review & editing

schistee@mail.nih.gov

Affiliation Epidemiology Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America

Competing Interests

Study funding/competing interest(s): Eunice Kennedy Shriver National Institute of Child Health and Human Development (Contract Nos. HHSN267200603423, HHSN267200603424, HHSN267200603426); NIH Medical Research Scholars Program; Doris Duke Charitable Foundation (Grant #2014194). The authors have no competing interests to report. Trial registration number: ClinicalTrials.gov, NCT00467363.