Contents: Research LetterAntibody Response to Coronavirus Disease 2019 (COVID-19) Messenger RNA Vaccination in Pregnant Women and Transplacental Passage Into Cord BloodPrabhu, Malavika MD; Murphy, Elisabeth A. PhD; Sukhu, Ashley C. BS; Yee, Jim BS; Singh, Sunidhi BA; Eng, Dorothy BA, BS; Zhao, Zhen PhD; Riley, Laura E. MD; Yang, Yawei J. MD, PhD Author Information Department of Obstetrics and Gynecology and the Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, the Laboratory of Molecular Neuro-oncology, the Rockefeller University, and the Department of Pathology and Laboratory Medicine, New York-Presbyterian Hospital/Weill Cornell Medical Center, New York, New York. Corresponding author: Yawei J. Yang, MD, PhD, Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY; email: [email protected]. Yawei J. Yang is funded through the COVID-19 research grant at Weill Cornell Medicine. Financial Disclosure Zhen Zhao received seed instruments and sponsored research from ET Healthcare and sponsored research from Roche. The other authors did not report any potential conflicts of interest. Published online ahead-of-print April 28, 2021. Peer reviews and author correspondence are available at https://links.lww.com/AOG/C318. Obstetrics & Gynecology 138(2):p 278-280, August 2021. | DOI: 10.1097/AOG.0000000000004438 Buy Metrics In Brief Coronavirus disease 2019 (COVID-19) vaccination in pregnancy induces a robust maternal immune response, with transplacental antibody transfer detectable in cord blood as early as 16 days after the first dose. © 2021 by the American College of Obstetricians and Gynecologists. Published by Wolters Kluwer Health, Inc. All rights reserved.