1. Department of Gynaecology and Obstetrics, Endocrinological and Reproductive Unit, Copenhagen University Hospital, Herlev Hospital , Herlev, Copenhagen, Denmark
2. The Fertility Department, Copenhagen University Hospital , Copenhagen, Denmark
3. Fertility Clinic, Department of Gynaecology and Obstetrics, University Hospital of Region Zealand , Køge, Denmark
4. London Women's Clinic , London, UK
5. Laboratory of Reproductive Biology, Copenhagen University Hospital , Copenhagen, Denmark