Department of Pediatrics, Perinatal and Maternal Medicine (Ibaraki), Graduate School, Tokyo Medical and Dental University, the Department of Social Medicine and the Division of Maternal Medicine, Center for Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, the Department of Obstetrics and Gynecology, Tokyo Saiseikai Central Hospital, and the Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan.

Corresponding author: Takayuki Tatsumi, MD, PhD, Department of Pediatrics, Perinatal and Maternal Medicine (Ibaraki), Graduate School, Tokyo Medical and Dental University, Tokyo, Japan; email: ttatcrm@tmd.ac.jp.

This work was partly supported by a grant from AMED-WISE (Project for Whole Implementation to Support and Ensure the Female Life; project code 19gk0210023s0401) to Naho Morisaki.

Financial Disclosure The authors did not report any potential conflicts of interest.

The authors thank Susan Furness, PhD, from Edanz Group for editing a draft of the manuscript.

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

Peer reviews and author correspondence are available at http://links.lww.com/AOG/B905.

Received January 30, 2020

Received in revised form March 25, 2020

Accepted April 02, 2020

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