Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, and the Department of Anesthesiology, the Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, the Department of Population Health Sciences, and the Critical Care and Perioperative Population Health Research (CAPER) Unit, Department of Anesthesiology, Duke University School of Medicine, Durham, North Carolina; and the Department of Obstetrics and Gynecology, University of California, San Francisco, San Francisco, California.

Corresponding author: Johanna Quist-Nelson MD, Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC; [email protected].

The project described was supported by the National Center for Advancing Translational Sciences (NCATS), National Institutes of Health, through Grant Award Number UL1TR002553 and UM1TR004406. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH.

Financial Disclosure Marie-Louise Meng receives grant support from the Foundation for Anesthesia Education and Research. Divya Mallampati receives salary support from the Health Resources and Services Administration. Jerome J. Federspiel is supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development through grant award K12HD103083. He receives grant support from the National Institutes of Health (NIH) Agreement and from Patient-Centered Outcomes Research Institute (PCORI) and received payment from Hemosquid. M. Kate Menard receives grant support from the National Institutes of Health (NIH) Agreement OT2HL158287 and from Patient-Centered Outcomes Research Institute (PCORI) AD-2020C3-21142. The other authors did not report any potential conflicts of interest.

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/D591.