*Department Obstetrics and Gynecology, OLVG

†Department Obstetrics and Gynecology, Amsterdam UMC

‡Department Obstetrics and Gynecology, VUmc, Amsterdam, The Netherlands

§Department of Obstetrics and Gynaecology, Medisch Spectrum Twente, Enschede

∥Department of Obstetrics and Gynecology, Zuyderland MC, Heerlen

¶Bergman Clinics Vrouw, Hilversum

#Department of Obstetrics and Gynecology, Breda

**Department of Obstetrics and Gynecology UMCG, Groningen

††Department of Obstetrics and Gynecology, MC Haaglanden, The Hague

‡‡College voor Zorgverzekeringen, Diemen

§§Department of Neurology

∥∥Professor Emeritus, Leiden, The Netherlands

¶¶Department Obstetrics and Gynecology, Monash University, Monash Medical Centre, Melbourne, Victoria, Australia

B.W.M. is supported by a NHMRC Investigatorgrant (GNT1176437). B.W.M. reports consultancy, travel support and research funding from Merck and consultancy for Organon and Norgine. B.W.M. holds stock from ObsEva. The remaining authors declare that they have nothing to disclose.

Correspondence: Marielle G. van Pampus, OLVG, Amsterdam, The Netherlands. E-mail: [email protected]