1. Department of Gynecological Endocrinology, Poznan University of Medical Sciences, Poznan, Poland;
2. Department of General of Colorectal Surgery, Poznan University of Medical Sciences, Poznan, Poland;
3. Poznan University of Medical Sciences, Poznan, Poland;
4. Department of Infertility and Reproductive Endocrinology, Poznan University of Medical Sciences, Poznan, Poland