1. Department of Obstetrics and Gynecology; Sahlgrenska University Hospital; Gothenburg Sweden
2. Center for Reproductive Epidemiology; Lund University; Lund Sweden
3. Department of Obstetrics and Gynecology; Lund University; Lund Sweden
4. Department of Obstetrics and Gynecology; Institute of Clinical Sciences; Sahlgrenska Academy; Gothenburg Sweden
5. Area of Health Data and Digitalization; Department of Genetics and Bioinformatics; Norwegian Institute of Public Health; Oslo Norway