1. Department of Obstetrics and Gynecology Seoul National University College of Medicine Seoul Korea
2. The Institute of Reproductive Medicine and Population Medical Research Center Seoul National University College of Medicine Seoul Korea
3. Department of Obstetrics and Gynecology SMG‐SNU Boramae Medical Center Seoul Korea
4. Department of Biostatistics SMG‐SNU Boramae Medical Center Seoul Korea
5. Department of Obstetrics and Gynecology Kyungpook National University School of Medicine Daegu Korea
6. Department of Obstetrics and Gynecology IORA Fertility Clinic Suwon Korea
7. Department of Obstetrics and Gynecology School of Medicine Dongguk University Seoul Korea
8. Department of Obstetrics and Gynecology Healthcare System Gangnam Center Seoul National University Hospital Seoul Korea