Gilbert G G Donders1,2,3, Pedro Vieira-Baptista4. 1. Femicare VZW Clinical Research for Women, Tienen, Belgium. 2. Department of Obstetrics and Gynecology, Regional Hospital H Hart Tienen, Belgium. 3. Department of Obstetrics and Gynecology, University Hospital Antwerp, Belgium. 4. Department of Obstetrics and Gynecology, Centro Hospitalar De São João, Porto, Portugal.