[1] Med Univ Lublin, Fac Hlth Sci, Independent Pract Obstetr Skills Unit, PL-20081 Lublin, Poland
[2] Med Univ Lublin, Chair & Dept Gynaecol & Gynaecol Endocrinol, Fac Hlth Sci, PL-20081 Lublin, Poland
[3] Med Ctr Postgrad Educ, Dept Obstet & Gynecol 1, Warsaw, Poland