1. Copenhagen University Hospital, Rigshospitalet, Recurrent Pregnancy Loss Unit, Fertility Clinic, 4071, Blegdamsvej 9, Copenhagen Ø, Denmark
2. University of Copenhagen, Department of Public Health, Section of Social Medicine, Øster Farimagsgade 5, Copenhagen, Denmark
3. Copenhagen University Hospital, Hvidovre Hospital, Department of Obstetrics and Gynaecology, Fertility Clinic, Kettegård Allé 30, Hvidovre, Denmark