1. Department of Obstetrics and Gynaecology, Center for Reproductive Medicine, Amsterdam UMC , Amsterdam, The Netherlands
2. Cochrane Gynaecology and Fertility Satellite , Amsterdam, The Netherlands
3. Amsterdam Reproduction and Development Research Institute , Amsterdam, The Netherlands
4. Birmingham Women’s and Children’s NHS Foundation Trust , Birmingham, UK
5. NIHR Biomedical Research Center, University Hospitals Birmingham , Birmingham, UK
6. WHO Collaborating Centre for Global Women’s Health, Institute of Metabolism and Systems Research, University of Birmingham , Birmingham, UK
7. Clinical Biostatistics Unit, Hospital Universitario Ramón y Cajal (IRYCIS) , Madrid, Spain
8. CIBER Epidemiology and Public Health (CIBERESP) , Madrid, Spain
9. UNDP/UNFPA/UNICEF/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), Department of Sexual and Reproductive Health and Research, World Health Organization , Geneva, Switzerland
10. Elizabeth Glaser Pediatric AIDS Foundation , Washington, DC, USA
11. Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London , London, UK
12. Barts Health NHS Trust , London, UK
13. St George’s University London , London, UK
14. Women and Childrens Hospital, Amsterdam UMC , Amsterdam, The Netherlands
15. Department Vrouw & Baby, Utrecht UMC, location University of Utrecht , Utrecht, The Netherlands
16. Tommy's Centre for Miscarriage Research , Birmingham, UK