1. Research Center for Reproductive Medicine, Gynecological Endocrinology and Menopause, IRCCS S. Matteo Foundation, University of Pavia, Pavia, Italy;
2. Gynaecology and Human Reproduction Physiopathology, DIMEC, S. Orsola Hospital, University of Bologna, Bologna, Italy;
3. Obstetrics and Gynecology Unit, Vita-Salute San Raffaele University and IRCCS San Raffaele Hospital, Milan, Italy;
4. Department of Obstetrics and Gynecology, University of Udine, Udine, Italy;
5. Shionogi srl, Rome, Italy;
6. Department of Obstetrics and Gynecology, Macedonio Melloni Hospital University of Milan, Milan, Italy