Introduction of advanced maternal age based on mortality-specific severe morbidity

Affiliations

• ¹ Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Southern California, California, Los Angeles, USA.
• ² Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Osaka, Japan.
• ³ Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Southern California, California, Los Angeles, USA.
• ⁴ Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Southern California, California, Los Angeles, USA.
• ⁵ Norris Comprehensive Cancer Center, University of Southern California, California, Los Angeles, USA.