1 Department of Obstetrics and Gynecology, Monash University, Clayton, Australia; Centre for Reproductive Medicine, Amsterdam UMC, Amsterdam, the Netherlands. Electronic address: e.m.bordewijk@amsterdamumc.nl.
2 Department of Obstetrics and Gynecology, Monash University, Clayton, Australia.
3 NHMRC Clinical Trials Centre, University of Sydney, Australia.
4 Centre for Epidemiology and Biostatistics, School of Population and Global Health, The University of Melbourne, Parkville, Australia.
5 Faculty of Medicine & Health Sciences, University of Nottingham, Nottingham, United Kingdom.
6 Centre for Reproductive Medicine, Amsterdam UMC, Amsterdam, the Netherlands.