1. Second Department of Obstetrics and Gynecology, The Center of Postgraduate Medical Education, Warsaw, Poland;
2. Department of Gynecological Endocrinology, Poznan University of Medical Sciences, Poznań, Poland;
3. Department of Obstetrics and Gynecological Nursing, Faculty of Health Sciences, Medical University of Gdańsk, Gdańsk, Poland;
4. INVICTA Fertility and Reproductive Center, Gdańsk, Poland;
5. First Department of Obstetrics and Gynecology, The Center of Postgraduate Medical Education, Warsaw, Poland