1 Fertility Clinic, Rigshospitalet, Copenhagen University Hospital, 2100 Copenhagen, Denmark.
2 Information Services Department, THL Finnish Institute for Health and Welfare, 00270 Helsinki, Finland.
3 Department of Neurobiology, Care Sciences and Society, Division of Family Medicine, Karolinska Institute, 17177 Stockholm, Sweden.
4 Department of Public Health and Nursing, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
5 Department of Obstetrics and Gynecology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital, 413 45 Gothenburg, Sweden.
6 Department of Obstetrics and Gynecology, University of Helsinki, Helsinki University Hospital, 00290 Helsinki, Finland.
8 Institute for Molecular Medicine Finland, Helsinki Institute of Life Science, University of Helsinki, 00290 Helsinki, Finland.
9 Department of Medical and Clinical Genetics, University of Helsinki, Helsinki University Hospital, 00290 Helsinki, Finland.
10 Department of Obstetrics and Gynecology, Tampere University Hospital and University of Tampere, Faculty of Medicine and Health Technology, 33520 Tampere, Finland.
11 Department of Biostatistics, University of Copenhagen, 1014 Copenhagen, Denmark.
12 Gynecological Clinic, Rigshospitalet, University of Copenhagen, 2100 Copenhagen, Denmark.