1. Department of Obstetrics and Gynecology, PEDEGO Research Unit and Medical Research Centre Oulu and PEDEGO Research Unit, Oulu, University Hospital of Oulu, University of Oulu, Oulu, Finland
2. Institute of Reproductive and Developmental Biology, Imperial College London, London, UK
3. Center for Life Course Health Research, Faculty of Medicine Medical Research Centre Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
4. Department of Epidemiology and Biostatistics, Medical Research Council-PHE (Public Health England) Centre for Environment & Health, School of Public Health, Imperial College London, London, UK; Centre for Life Course Epidemiology, Faculty of Medicine, University of Oulu, Oulu, Finland
5. Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
6. Faculty of Medicine, University of Oulu, Oulu, Finland