1 Department of Obstetrics, Gynaecology and Reproductive Medicine, Dexeus Mujer, Dexeus University Hospital, Barcelona, Spain, Gran Vía de Carles III, 71-75, Barcelona, Spain, 08028.
2 Conceptum - Unidad de Fertilidad del Country. Bogotá, Colombia. 110221.
3 Department of Clinical Medicine, Aarhus University, Denmark.