Department of Public Health Sciences and the Division of Ultrasound, Department of Diagnostic Radiology, Henry Ford Health, Detroit, the Department of Obstetrics, Gynecology and Reproductive Biology, and the Department of Epidemiology and Biostatistics, College of Human Medicine, Michigan State University, East Lansing, and the Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, Michigan; the Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts; the Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, the Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Durham, and the Department of Health and Human Services, Durham, North Carolina.

Corresponding author: Ganesa Wegienka, Department of Public Health Sciences, Henry Ford Health System, Detroit, MI; email: [email protected].

This work was funded by R01 ES028235. This work was also supported, in part, by the Intramural Research Program of the National Institutes of Health, National Institute of Environmental Health Sciences and funds from the American Recovery and Reinvestment Act funds designated for National Institute of Health research.

Financial Disclosure Erica E. Marsh is a consultant for Myovant Sciences and Pzifer Inc. Lauren A. Wise is a consultant for AbbVie Inc. The other authors did not report any potential conflicts of interest.

The authors thank Dr. Lynn Marshall for providing data from the Nurses' Health Study II.

Each author has confirmed compliance with the journal's requirements for authorship.

Peer reviews and author correspondence are available at https://links.lww.com/AOG/C924.