1. Department of Obstetrics and Gynaecology, Center for Reproductive Medicine, Amsterdam University Medical Center (UMC), University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
2. Department of Sexology and Psychosomatic Obstetrics and Gynaecology, Amsterdam University Medical Center (UMC), 1105 AZ Amsterdam, The Netherlands
3. Department of Development and Regeneration, University of Leuven (KU Leuven), 3000 Leuven, Belgium
4. Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, Amsterdam University Medical Center (UMC), Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands
5. Research Foundation of Flanders, Belgium